Civil Aviation Department Hong Kong, China Airworthiness Notice No. 3

31 January 2006AN-3 P.1

CIVIL AVIATION DEPARTMENTHONG KONG, CHINA

Airworthiness Notice

No. 3Issue 23

31 January 2006

LICENSED AIRCRAFT MAINTENANCE PERSONNEL–CERTIFICATIONRESPONSIBILITIES OF TYPE RATED/AUTHORISED PERSONNEL IN

RELATION TO ARTICLES 9 AND 11 OF THE AIR NAVIGATION (HONG KONG)ORDER 1995 AND HONG KONG AVIATION REQUIREMENT HKAR145.50

1 General

The purpose of this Notice is to describe the certification responsibilities of LicensedAircraft Maintenance Personnel. Such personnel are the holders of an AircraftMaintenance Licence issued under HKAR-66. The responsibilities apply whenissuing certifications either as a Type Rated licence holder or a certifying staffholding a certification authorisation. It also describes the privileges of the variousType Rated licences.

It should be noted that where the holder of a licence is performing maintenanceactivities on an aircraft on which he or she is not appropriately licensed, i.e. acting asa non-certifying staff, they are still expected to act responsibly and carry out suchwork in accordance with the procedures and standards identified in the followingparagraphs.

A licence issued by the Director-General does not confer any certification privilegeswith respect to aircraft which are not registered in Hong Kong unless the licenceholder is entitled to certify for such activities by way of having the licence validatedby the relevant Airworthiness Authority and/or is authorised by a maintenanceorganisation approved by that Authority.

NOTES: (1) A HKAR-66 Aircraft Maintenance Licence does not normally confer anycertification privileges on the holder in their own right. Such licence must be usedin conjunction with a certification authorisation. See paragraph 1.10.

(2) In the context of this Notice, reference to an authorisation means an authorisationissued by a HKAR-145 approved maintenance organisation approved by theDirector-General to allow the holder to issue certifications within the limitationsshown on the authorisation.

1.1 The Certificate referred to under Article 9 of the Air Navigation (Hong Kong)Order 1995 as amended is a Certificate of Maintenance Review to be issuedfollowing completion of the review required by the Order. The certificatereferred to under Article 11 of the Air Navigation (Hong Kong) Order 1995 as

31 January 2006 AN-3 P.2

amended is a Certificate of Release to Service to be issued on completion ofmaintenance of aircraft or components, either required or not required to bemaintained under the provisions of HKAR-145.

1.2 In connection with the issue of Certificates of Release to Service, thefollowing definitions apply:

(a) Maintenance means any one or combination of overhaul, repair,inspection, replacement, modification or defect rectification of anaircraft/aircraft component.

(b) Overhaul means the restoration of an aircraft/aircraft component byinspection and replacement in conformity with an approved standard toextend the operational life.

(c) Repair means the restoration of an aircraft/aircraft component to aserviceable condition in conformity with an approved standard.

(d) Inspection means the examination of an aircraft/aircraft component toestablish conformity with an approved specification.

(e) Replacement is any work operation which involves the removal andreplacement of the same part or the substitution of an approvedalternative part.

(f) Modification means the alternation of an aircraft/aircraft componentin conformity with an approved standard.

NOTE 1: Defect rectification normally consists of an element of inspection andtroubleshooting followed by repair and replacement of the defective item.

NOTE 2: Inspection includes:

(i) Mandatory Inspection, an inspection classified as Mandatory by theDirector-General, where the inspection itself is the work. (SeeAirworthiness Notice No.36).

(ii) Scheduled Maintenance Inspection, an inspection or maintenanceincluding tests required by the Approved Maintenance Schedule orProgramme.

1.3 Although many terms in common usage describe the various aspects ofaircraft engineering, the meanings assigned to such terms are not always thesame. For the purpose of this Notice, in relation to airworthiness, thefollowing definitions apply:

(a) Condition – the physical state of an item.


(b) Assembly – that items are fitted, assembled, attached, installed,connected, secured or adjusted in the approvedmanner.

(c) Functioning – operation in the approved manner achieving suchperformance, range of movement and freedom ofmovement as may be specified.

The certifying staff shall be responsible for the condition, assembly andfunctioning of the aircraft or its components for maintenance that has beencertified under the privileges of a Type Rated licence or an authorisation.

1.4 The certifying staff shall be responsible for ensuring that work is performedand recorded in a satisfactory manner taking into account the following:

(a) Whenever work is carried out on an aircraft, it is the duty of all personsto whom this Notice applies to ensure that the work, for which they areresponsible, progresses in a managed and controlled manner. Wherethey are supported by additional staff to carry out the work,consideration shall be given by them before starting the work to themanpower resource available and the abilities of the staff concerned.This is to ensure that the certifying staff determines and exercises anadequate degree of supervision over such staff.

(b) In relation to work carried out on an aircraft, it is the duty of all

persons to whom this Notice applies to ensure that an adequate recordof the work carried out is maintained. This is particularly importantwhere such work carries on beyond a working period or shift, or ishanded over from one person to another. The work accomplished,particularly if only disassembly or disturbance of components oraircraft systems, should be recorded as the work progresses or prior toundertaking a disassociated task. In any event, records should becompleted no later than the end of the work period or shift of theindividual undertaking the work. Such records should include 'open'entries to reflect the remaining actions necessary to restore the aircraftto a serviceable condition prior to release. In the case of complextasks which are undertaken frequently, consideration should be givento the use of pre-planned stage sheets to assist in the control,management and recording of these tasks. Where such sheets areused, care must be taken to ensure that they accurately reflect thecurrent requirements and recommendations of the manufacturer andthat all key stages, inspections, or replacements are recorded.

(c) It is also the duty of all persons to whom this Notice applies toconsider the effect such work may have, directly or indirectly, on itemswhich are the responsibilities of other such persons. In all caseswhere an overlap of responsibility between licence categories occurs,


the person primarily responsible for the item must involve all othertrade disciplines affected. Every person to whom this Notice appliesmust therefore be conversant with all other relevant paragraphs of thisNotice. Certificates of Release to Service for each relevant tradecategory must be issued by all persons concerned, each assumingresponsibility of and certifying those aspects of the work for which thelicence/authorisation holder is entitled to assume responsibility.

1.5 A Certificate of Release to Service shall only be issued on completion ofmaintenance when the signatory is satisfied that the work has been properlycarried out and accurately recorded, having due regard to the use of:

(a) up-to-date instructions and maintenance data (including manuals,drawings, specifications, CAD mandatory modifications/inspections,and, where applicable, company procedures);

(b) recommended tooling and test equipment which is currently calibratedwhere applicable; and

(c) a working environment appropriate to the work being carried out.

When issuing a Certificate of Release to Service for work performed by others,the certifying staff assumes responsibility. The certifying staff must haveinspected a sufficiently representative sample of the work and the associateddocumentation, and be satisfied with the competence of the persons who haveperformed the work. For complex tasks this may require progressiveinspections to be carried out as the work proceeds. In the case of an aircraftor component where welding a metallic part is considered essential toairworthiness, it is the responsibility of the certifying staff to establish that thewelder is approved in accordance with the requirements in HKAR-1 Sub-section 1.8-10.

NOTE: HKAR-66 Aircraft Maintenance Licence holders certifying under the privileges oftheir licence may not deviate from the manufacturer's maintenance instruction ormaintenance data, nor use alternative parts, components or assemblies unless suchdeviation is supported by the written agreement of the manufacturer, approved as amodification or agreed by the Director-General. The Director-General should beconsulted in cases of difficulty. Certifying staff shall comply with all companyprocedures covering such issues.

1.6 (a) When the work involves the assembly or any disturbance of a vitalpoint defined in HKAR-1 Sub-section 1.5-3 or control system, theduplicate inspection required must be completed and certified inaccordance with HKAR-1 Sub-section 1.6-2 before the relevantCertificate of Release to Service is issued.


(b) The holder of a Type Rated HKAR-66 Licence in Category B1 maymake certification on aircraft (or their engines, as appropriate) below5700 kg Maximum Total Weight Authorized for Duplicate Inspectionsof minor adjustments to control systems on other types within theCategory in which the licence is Type Rated.

Note: A minor adjustment is considered to be a single point adjustment orreassembly of a control.

1.7 The holder of an appropriately Type Rated HKAR-66 licence in Category B1may issue a Certificate of Release to Service to cover Non Destructive TestInspections on aircraft or components, within the privileges of the licence orauthorisation held, subject to the work being carried out as follows:

(a) Inspection requiring the use of Field Kit for the Colour Contrast DyePenetrant technique may be carried out by persons either Type Ratedas above or persons qualified in accordance with Airworthiness NoticeNo. 94.

(b) Non Destructive Test Inspections requiring any other technique,including Fluorescent Penetrant Dye, shall be carried out and signedfor by persons appropriately qualified in accordance withAirworthiness Notice No. 94 prior to the issue of the Certificate ofRelease to Service by a licensed or authorised certifying staff.

1.8 Use of either a Type Rated licence or an authorisation to issue a certificationrequires that, in addition to the licence or authorisation being valid at the timeof certification, the holder has been engaged for periods totalling at least 6months during the 12 months preceding the date of the certification on workaffording experience comparable with that required for the grant of thelicence/authorisation.

1.9 A Type Rated licensed certifying staff may issue the certificates identifiedbelow in relation to aircraft for which the licence is Type Rated and inaccordance with the privileges detailed in the remaining paragraphs to thisNotice. An authorised certifying staff may only issue these certificates aspermitted within the limits of the authorisation.

(a) Certificates of Release to Service for aircraft not required to bemaintained under HKAR-145 — the holder of an appropriately TypeRated licence may issue Certificates of Release to Service subject tocompliance with the requirements of HKAR-1 Sub-section 1.6-2 and1.6-7.

(b) Certificate of Maintenance Review — the Director-General willspecify who may issue a Certificate of Maintenance Review. For anorganisation approved in accordance with HKAR-145 the signatory


will be a person authorised in accordance with the Appendix No.3 toSub-section 1.8-13. For all other cases the signatory will be anengineer possessing an appropriately type rated HKAR-66 Category Bor C Licence valid in the sub-category of the aircraft reviewed.

(c) Certificates of Fitness for Flight — the holder of an appropriatelyType Rated HKAR-66 licence in Category B1 may issue Certificatesof Fitness for Flight subject to compliance with the requirements ofHKAR-1 Sub-section 1.3-8.

NOTES: (1) For aircraft listed in Paragraph 14 of Airworthiness Notice No.10certificates shall only be issued by appropriately authorisedcertifying staff. (See also Appendix 4 to Airworthiness Notice No.14)

(2) A HKAR-66 Aircraft Maintenance Licence may only be used toissue the above certificates outside of a HKAR-145 approvedmaintenance organisation where the licence is endorsed to permitthis and such privileges shall be limited to Hong Kong registeredaircraft not used for commercial air transport.

1.10 HKAR-66 Aircraft Maintenance Licences (Aircraft Maintenance Licence withType Ratings, if applicable) may be used to allow the grant of an authorisationwithin a HKAR-145 approved maintenance organisation. In addition to theforegoing paragraphs, when working within such organisations, the licensedcertifying staff should be aware that he/she is part of a comprehensivemaintenance system. It is therefore important to realise that companyprocedures may further define, or require specific actions, as to how certainissues are to be dealt with and these procedures must be adhered to. It is alsoimportant to realise that when working within a HKAR-145 approvedmaintenance organisation and certifying under the privileges of anauthorisation the licensed certifying staff is not certifying under the privilegesof the licence.

2 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'A'–Aeroplanes

NOTE: This paragraph must be read in conjunction with paragraph 1 of this Notice No. 3 andparticular attention must be paid to sub-paragraphs 1.3, 1.4, 1.5 and 1.6 which are concernedwith areas of responsibility.

2.1 The holder of a HKAR-AMEL Category 'A' licence may issue Certificates ofRelease to Service in respect of maintenance in relation to aeroplanes (but notincluding engines) for which the licence is Type Rated.

2.2 In connection with the certification of maintenance the holder of a Type RatedHKAR-AMEL Licence in Category 'A' is responsible for all parts of theaeroplane subject to the limitations detailed in sub-paragraph 2.3 and 2.4below (excluding those parts which are the responsibility of the holder of a


Type Rated HKAR-AMEL Licence in Category 'C').

2.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'A' may issueCertificates of Release to Service relating to maintenance (excluding overhaul)of parts of the aeroplane for which the holder is responsible, providing that thework has not involved any of the following:-

(a) Bolted joints requiring special techniques.

(b) Complete riveted joints in primary structures.

(c) Complete glued joints in primary structures.

(d) Bonded assemblies in primary structures.

(e) Composite material primary structures.

(f) Welded and brazed joints, other than minor weld repairs carried out byan Approved Welder, but excluding replacement of structural membersor repairs to flying control components.

(g) Cotton, linen, polyester and glass fibre fabric covering of a completefuselage or aerofoil.

(h) The disturbing of individual parts of units which are supplied as benchtested units, except for the replacement or adjustment of itemsnormally replaceable or adjustable in service.

2.4 In connection with the maintenance of instrument, electrical, automatic pilotand radio systems installed in aeroplanes (excluding overhaul or such systemsas are associated with the engine(s) and auxiliary power unit(s)) the holder ofa Type Rated HKAR-AMEL Licence in Category 'A' is entitled to issueCertificates of Release to Service for aircraft for which he/she holds a TypeRating, subject to the limitations detailed in sub-paragraphs 2.4.1, 2.4.2, 2.4.3,2.4.4 and 2.4.5.

NOTE: Where no limitations are shown, Certificates of Release to Service may be issued forrepair, replacement, modification, mandatory inspection or scheduled maintenanceinspection. In respect of the certification of scheduled maintenance inspections,reference should also be made to the Maintenance Schedule Approval Documentwhich may require certification specifically by an engineer licensed in theappropriate HKAR-AMEL 'X' or 'R' Category. However, in the absence of such arequirement, the holder of a Type Rated HKAR-AMEL Licence in Category 'A'–Aeroplanes assumes the responsibility for establishing compliance with themaintenance schedule requirements on the systems before issuing the Certificate ofRelease to Service.


2.4.1 In respect of instrument systems in the aeroplane (excludinginstrument systems associated with the engine(s) and auxiliary powerunit(s)):-

(a) If the aeroplane has an instrument system specified in sub-paragraphs 8.1 of Airworthiness Notice No.10, Certificates ofRelease to Service may be issued.

(b) If the aeroplane has an instrument system specified in sub-paragraphs 8.3 to 8.4 inclusive of Airworthiness Notice No.10,Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

2.4.2 In respect of electrical systems in the aeroplane (excluding electricalsystems associated with the engine(s) and auxiliary power unit(s)):

(a) If the aeroplane has an electrical system specified in sub-paragraphs 9.1 of Airworthiness Notice No.10, Certificates ofRelease to Service may be issued.

(b) If the aeroplane has an electrical system specified in sub-paragraphs 9.2 to 9.4 inclusive of Airworthiness Notice No.10,Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

2.4.3 In respect of automatic pilots systems in the aeroplanes:

(a) If the aeroplane has an automatic pilot system specified in sub-paragraph 13.1 of Airworthiness Notice No.10 installed,Certificates of Release to Service may be issued.

(b) If the aeroplane has an automatic pilot system specified in sub-paragraph 13.2 of Airworthiness Notice No.10 installed,Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

(c) If the aeroplane has an automatic pilot system as specified insub-paragraph 13.3, Certificates of Release to Service may notbe issued.

2.4.4 Certificates of Release to Service may not be issued in respect of radiosystems, except that if the aeroplane has a MTWA not exceeding 2730kg, certificates may be issued in respect of the replacement of VHFcommunication equipment only.


2.4.5 Certificates of Release to Service may not be issued in respect ofcompass compensation and adjustment unless the licence is endorsedto that effect.

3 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'B'–Aeroplanes or Rotorcraft


3.1 The holder of a HKAR-AMEL Category 'B' Licence may issue Certificates ofRelease to Service in respect of overhaul, repair, replacement, modificationand mandatory inspection in relation to aeroplanes or rotorcraft (but notincluding engines) for which the licence is Typed Rated, subject to thelimitations of sub-paragraphs 3.2 and 3.3.

3.2 HKAR-AMEL Category 'B'–Aeroplanes

3.2.1 In connection with the certification of overhaul, repair, replacement,modification and mandatory inspection, the holder of a Type RatedHKAR-AMEL Licence in Category 'B' – Aeroplanes is responsible forall parts of the aeroplane (provided that the work does not involve themaking of components or parts) excluding those parts which are theresponsibility of the holder of a Type Rated HKAR-AMEL Licence inCategory 'C' or 'D' and subject to the same limitations as detailed insub-paragraph 2.4 for HKAR-AMEL Category 'A' and excluding theoverhaul of electrical, instrument or automatic pilot systems.

3.2.2 Notwithstanding the above the holder of a Type Rated HKAR-AMELLicence in Category 'B' may also issue Certificates of Release toService relating to all aspects of overhaul, repair, replacement,modification and mandatory inspection relating to items listed as (a) to(e) below, except for those parts which form part of or are attached tothe engine, provided that the work does not involve the making ofcomponents or parts.

(a) Engine mounting structures and cowlings

(b) Engine controls

(c) Engine fuel, oil and coolant systems

(d) Engine fire extinguishing systems

(e) Engine fluid de-icing systems


3.3 HKAR-AMEL Category 'B' – Rotorcraft

3.3.1 In connection with the certification of overhaul, repair, replacement,modification and mandatory inspection the holder of a Type RatedHKAR-AMEL Licence in Category 'B' – Rotorcraft is responsible forall parts of the rotorcraft (provided that the work does not involve themaking of components or parts) excluding those parts which are theresponsibility of the holder of a Type Rated HKAR-AMEL Licence inCategory 'D' and subject to the same limitations as detailed in sub-paragraph 6.5 for HKAR-AMEL Category 'A' and 'C' Rotorcraftexcluding the overhaul of electrical, instrument, automatic pilotsystems, main and tail rotor blades.

4 Aircraft Maintenance Engineers – Type Rated in HKAR-AMEL Category 'C' –Engines


4.1 The holder of a HKAR-AMEL Category 'C' Licence may issue Certificates ofRelease to Service in respect of maintenance in relation to engines andauxiliary power units for which the licence is Type Rated.

4.2 In connection with the certification of maintenance (excluding overhaul) theholder of a Type Rated HKAR-AMEL Licence in Category 'C' is responsiblefor all parts of the engine(s), the engine installation(s), auxiliary power unit(s),other propulsive device(s) and all associated systems and devices which areconcerned with their operation, subject to the limitations detailed in sub-paragraphs 4.3, 4.4, 4.5 and 4.6 (excluding those parts which are theresponsibility of the holder of a Type Rated HKAR-AMEL Licence inCategory 'D').

4.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'C' may issueCertificates of Release to Service relating to maintenance (excluding overhaul)of components or parts for which the holder is responsible, provided that thework has not involved:-

(a) Dismantling of a piston engine other than to obtain access to thepiston/cylinder assemblies or the removal of the engine rear accessorycover to inspect and/or replace oil pump assemblies where such workdoes not involve the removal and refitment of internal gears.

(b) Dismantling of main casings or main rotating assemblies of a turbineengine, except as detailed in sub-paragraph 4.4.


(c) The removal or dismantling of reduction gears.

(d) Propeller balancing, except for the certification of static balancingwhere required by the maintenance manual and dynamic balancing oninstalled propellers using electronic balancing equipment wherepermitted by the maintenance manual or other approved airworthinessdata. The work itself may have been carried out by an LicensedAircraft Engineer who has received suitable training on the balancingequipment to be used and the associated procedures, or by anorganisation approved for that purpose and which has issued anApproved Test Certificate for the inspection.

(e) Welded and brazed joints, other than minor weld repairs to exhaustunits carried out by an Approved Welder but excluding componentreplacement.

(f) The disturbing of individual parts of units which are supplied as benchtested units, except for the replacement or adjustment of itemsnormally replaceable or adjustable in service.

4.4 Where the maintenance manual for the particular engine provides instructionfor the task, replacement of main casings and/or rotating assembliescomprising the whole or part of a particular rotating system will be permittedprovided that removal from the engine is achieved solely by disconnecting theflanges of main casings. In accordance with the above principles, someengines have been assigned the following symbols, @ or # in AirworthinessNotice No.10. Dismantling of these engines is permissible, but is limited to:-

(a) @ ─ Removal/replacement of main casings, excluding those whoseremoval results in concurrent removal of a rotating assembly from theengine. No dismantling of main rotating assemblies is permitted.

(b) # ─ Removal/replacement of main casings including those whoseremoval results in concurrent removal of a rotating assembly from theengine, provided this is accomplished solely by disconnecting at thecasing flanges. No dismantling of main rotating assemblies ispermitted.

4.5 In connection with the maintenance of instrument, electrical and automaticpilot systems installed in aeroplanes, the holder of a Type Rated HKAR-AMEL Licence in Category 'C' is entitled to issue Certificates of Release toService in respect of such systems associated with engine and auxiliary powerunit installations for which the holder has a Type Rating, subject to thelimitations detailed in sub-paragraphs 4.5.1, 4.5.2 and 4.5.3.

NOTE: Where no limitations are shown, Certificates of Release to Service may be issued forreplacement, modification, repair, mandatory inspection or scheduled maintenance


inspection. In respect of the certification of scheduled maintenance inspectionsreference should also be made to the Maintenance Schedule Approval Documentwhich may require certification specifically by an engineer licensed in theappropriate HKAR-AMEL 'X' Category. However, in the absence of such arequirement, the holder of a Type Rated HKAR-AMEL Licence in Category 'C'–Engines assumes the responsibility for establishing compliance with the maintenanceschedule requirements on the systems before issuing the Certificate of Release toService.

4.5.1 In respect of instrument systems associated with the engine(s) andauxiliary power unit(s):-

(a) If the engine is installed in an aeroplane which has aninstrument system specified in sub-paragraph 8.1 ofAirworthiness Notice No. 10, Certificates of Release to Servicemay be issued.

(b) If the engine is installed in an aeroplane which has aninstrument system specified in sub-paragraphs 8.3 to 8.4inclusive of Airworthiness Notice No. 10, Certificates ofRelease to Service may be issued relating to replacements only,provided that functioning checks to prove serviceability do notrequire the use of test apparatus.

4.5.2 In respect of electrical systems associated with the engine(s) andauxiliary power unit(s):-

(a) If the engine is installed in an aeroplane which has an electricalsystem specified in sub-paragraph 9.1 of Airworthiness NoticeNo. 10, Certificates of Release to Service may be issued.

(b) If the engine is installed in an aeroplane which has an electricalsystem specified in sub-paragraphs 9.2 to 9.4 inclusive ofAirworthiness Notice No. 10, Certificates of Release to Servicemay be issued relating to replacements only, provided thatfunctioning checks to prove serviceability do not require theuse of test apparatus.

4.5.3 In respect of automatic pilot systems associated with the engine(s):-

(a) If the aeroplane has an automatic pilot system specified in sub-paragraph 13.1 of Airworthiness Notice No. 10 installed,Certificates of Release to Service may be issued.

(b) If the aeroplane has an automatic pilot system specified in sub-paragraph 13.2 of Airworthiness Notice No. 10 installed,Certificates of Release to Service may be issued relating to


replacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

(c) If the aeroplane has an automatic pilot system specified in sub-paragraph 13.3 of Airworthiness Notice No. 10, Certificates ofRelease to Service may not be issued.

5 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'D'–Engines


5.1 The holder of a HKAR-AMEL Category 'D' Licence may issue Certificates ofRelease to Service relating to engines for which the licence is Type Rated inrespect of overhauls, repairs, replacements, modifications and mandatoryinspections, subject to the limitations of sub-paragraphs 5.2 and 5.3.

5.2 In connection with overhaul, repair, replacement, modification and mandatoryinspection, the holder of a Type Rated HKAR-AMEL Licence in Category 'D'is responsible for all parts of the engine including functioning only insofar astest bed performance is concerned. The certification of functioning insofaras an installed engine is concerned must be made in conjunction with a holderof a Type Rated HKAR-AMEL Licence in Category 'C'.

5.3 The holder of a HKAR-AMEL Category 'D' Licence may issue Certificates ofRelease to Service relating to all aspects of overhaul, repair, replacement,modification and mandatory inspection of components and parts of the engineonly (excluding overhaul, repair, replacement, modification and mandatoryinspection of ignition apparatus, instrument equipment and electricalequipment) provided that the work does not involve the making ofcomponents or parts.

6 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Categories 'A'& 'C'– Rotorcraft

NOTE 1: This paragraph must be read in conjunction with paragraph 1 of this Notice No. 3 andparticular attention must be paid to sub-paragraphs 1.3, 1.4, 1.5 and 1.6 which areconcerned with areas of responsibility.

NOTE 2: A HKAR-AMEL Category 'A' and 'C' Rotorcraft Licence may not be used to certify forpiston or jet turbine engines installed in aeroplanes.

6.1 The holder of a HKAR-AMEL Categories 'A' and 'C' Rotorcraft Licence mayissue Certificates of Release to Service in respect of maintenance in relation torotorcraft and its engines for which the licence is Type Rated.


6.2 In connection with the certification of maintenance the holder of a Type RatedHKAR-AMEL Licence in Categories 'A' and 'C'–Rotorcraft is responsible forall parts of the rotorcraft subject to the limitations detailed in sub-paragraph6.3, 6.4 and 6.5.

6.3 The holder of a Type Rated HKAR-AMEL Licence in Categories 'A' and 'C'–Rotorcraft may issue Certificates of Release to Service relating to maintenance(excluding overhaul) of parts of the rotorcraft for which the holder isresponsible, provided that the work has not involved any of the following:

(a) Bolted joints requiring special techniques.

(b) Complete riveted joints in primary structures.

(c) Complete glued joints in primary structures.

(d) Bonded assemblies in primary structures.

(e) Composite material primary structures.

(f) Welded and brazed joints, other than minor weld repairs to aircraftstructure or exhaust units carried out by an Approved Welder butexcluding structural or component replacement.

(g) Dismantling of a piston engine other than to obtain access to thepiston/cylinder assemblies or the removal of the engine rear accessorycase cover to inspect and/or replace oil pump assemblies where suchwork does not involve the removal and refitment of internal gears.

(h) Dismantling of main casings or main rotating assemblies of a turbineengine, except as detailed in sub-paragraph 6.4.

(i) Dismantling of gearbox casings, except that separation of casings toobtain access for the purposes of internal inspections in accordancewith the manufacturer's instructions is permitted.

(j) Rotor balancing except those rotors which require check balancing inaccordance with the aircraft maintenance manual, and providingsuitable training on the balancing equipment and procedure has beenreceived.

(k) The disturbing of individual parts of units which are supplied as benchtested units, except for the replacement or adjustment of itemsnormally replaceable or adjustable in service.

6.4 Where the maintenance manual for the particular engine provides instructionfor the task, replacement of main casings and/or rotating assemblies


comprising the whole or part of a particular rotating system will be permittedprovided that removal from the engine is achieved solely by disconnecting theflanges of main casings. In accordance with the above principles, someengines have been assigned the following symbols, @ or #, in AirworthinessNotice No.10. Dismantling of these engines is permissible, but is limited to:-

(a) @ ─ Removal/replacement of main casings, excluding those whoseremoval results in concurrent removal of a rotating assembly from theengine. No dismantling of main rotating assemblies is permitted.

(b) # ─ Removal/replacement of main casings including those whoseremoval results in concurrent removal of a rotating assembly from theengine, provided this is accomplished solely by disconnecting at thecasing flanges. No dismantling of main rotating assemblies ispermitted.

6.5 In connection with the maintenance of instrument, electrical, automatic pilotand radio systems installed in rotorcraft (excluding overhaul) the holder of aType Rated HKAR-AMEL Licence in Categories 'A' and 'C'–Rotorcraft isentitled to issue Certificates of Release to Service for rotorcraft for whichhe/she holds a Type Rating, subject to the limitations detailed in sub-paragraphs 6.5.1, 6.5.2, 6.5.3 and 6.5.4.

NOTE: Where no limitations are shown, Certificates of Release to Service may be issued forreplacement, modification, repair, mandatory inspection or scheduled maintenanceinspection. In respect of the certification of scheduled maintenance inspections,reference should also be made to the Maintenance Schedule Approval Documentwhich may require certification specifically by an engineer licensed in theappropriate HKAR-AMEL 'X' or 'R' Category. However, in the absence of such arequirement, the holder of a Type Rated HKAR-AMEL Licence in Categories 'A' and'C'–Rotorcraft assumes the responsibility for establishing compliance with themaintenance schedule requirements on the systems before issuing the Certificate ofRelease to Service.

6.5.1 In respect of instrument systems in the rotorcraft if the rotorcraft isspecified in sub-paragraph 7.4 of Airworthiness Notice No. 10,Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

6.5.2 In respect of electrical systems in the rotorcraft if the rotorcraft isspecified in sub-paragraph 7.4 of Airworthiness Notice No. 10,Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

6.5.3 In respect of automatic pilot/automatic stabiliser systems in rotorcraftif the rotorcraft has an automatic pilot/automatic stabiliser system


specified in sub-paragraph 13.4 or 13.5 of Airworthiness Notice No. 10installed, Certificates of Release to Service may be issued relating toreplacements only, provided that functioning checks to proveserviceability do not require the use of test apparatus.

6.5.4 Certificates of Release to Service may not be issued in respect of radiosystems, except that if the rotorcraft has a MTWA not exceeding 2730kg, certificates may be issued in respect of the replacement of VHFcommunication equipment only.

7 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'X'–Instruments


7.1 The holder of a HKAR-AMEL Category 'X'–Instruments Licence may issueCertificates of Release to Service in respect of maintenance in relation toaircraft instrument systems for which the licence is Type Rated, subject to thelimitations detailed in sub-paragraph 7.3.

7.2 In connection with the certification of maintenance, excluding overhaul, theholder of a Type Rated HKAR-AMEL Licence in Category 'X'–Instrumentsis responsible for all parts of instrument systems included in the Type Rating.

7.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'X'–Instruments may issue Certificates of Release to Service in respect ofmaintenance, excluding overhaul, of components and parts for which theholder is responsible provided that units which are supplied as bench testedunits may not have their individual parts disturbed, except for the replacementor adjustment of items normally replaceable or adjustable in service.

8 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'X'–Electrical


8.1 The holder of a HKAR-AMEL Category 'X'–Electrical Licence may issueCertificates of Release to Service in respect of maintenance in relation toaircraft electrical systems for which the licence is Type Rated, subject to thelimitations detailed in sub-paragraph 8.3.

8.2 In connection with the certification of maintenance, excluding overhaul, theholder of a Type Rated HKAR-AMEL Licence in Category 'X'–Electrical is


responsible for all parts of electrical systems included in the Type Rating.

8.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'X'–Electrical may issue Certificates of Release to Service in respect ofmaintenance, excluding overhaul, of components and parts for which theholder is responsible provided that units which are supplied as bench testedunits may not have their individual parts disturbed, except for the replacementor adjustment of items normally replaceable or adjustable in service.

9 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'X'–Automatic Pilots

NOTES: (1) This paragraph must be read in conjunction with paragraph 1 of this Notice No.3 andparticular attention must be paid to sub-paragraphs 1.3, 1.4, 1.5 and 1.6 which areconcerned with areas of responsibility.

(2) For the purpose of certification, automatic stabilisation systems are deemed to beautomatic pilots.

(3) Automatic pilots include related systems such as yaw and/or roll dampers, mach trimsystems, and automatic throttles.

9.1 The holder of a HKAR-AMEL Category 'X'–Automatic Pilots Licence mayissue Certificates of Release to Service in respect of maintenance in relation toaircraft automatic pilot systems for which the licence is Type Rated, subject tothe limitations detailed in sub-paragraph 9.3.

9.2 In connection with the certification of maintenance, excluding overhaul, theholder of a Type Rated HKAR-AMEL Licence in Category 'X'–AutomaticPilots is responsible for all parts of the automatic pilot systems included in theType Rating.

9.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'X'–Automatic Pilots may issue Certificates of Release to Service in respect ofmaintenance, excluding overhaul, of components and parts for which theholder is responsible provided that units which are supplied as bench testedunits may not have their individual parts disturbed, except for the replacementor adjustment of items normally replaceable or adjustable in service.

10 (Reserved)

11 Aircraft Maintenance Engineers–Type Rated in HKAR-AMEL Category 'R'–Radio

NOTE: This paragraph must be read in conjunction with paragraph 1 of this Notice No. 3 andparticular attention paid to sub-paragraphs 1.3, 1.4, 1.5 and 1.6 which are concerned withareas of responsibility.


11.1 The holder of a HKAR-AMEL Category 'R'–Radio Licence may issueCertificates of Release to Service in respect of maintenance in relation toaircraft radio systems for which the licence is Type Rated, subject to thelimitations detailed in sub-paragraph 11.3.

11.2 In connection with the certification of maintenance, excluding overhaul, theholder of a Type Rated HKAR-AMEL Licence in Category 'R'–Radio isresponsible for all parts of the radio systems included in the Type Rating.

11.3 The holder of a Type Rated HKAR-AMEL Licence in Category 'R'–Radiomay issue Certificates of Release to Service in respect of maintenance,excluding overhaul, of components and parts for which the holder isresponsible provided that units which are supplied as bench tested units maynot have their individual parts disturbed, except for the replacement oradjustment of items normally replaceable or adjustable in service.

11.4 The holder of a Type Rated HKAR-AMEL Licence in Category 'R'–Radio,endorsed to include the overhaul of radio apparatus, is responsible for and mayissue Certificates of Release to Service in respect of the maintenance ofcomponents and parts of all radio apparatus undergoing periodic check, repairor overhaul in workshop for which the licence is Type Rated, provided that thework done does not involve the making of radio components or parts.

11.5 The holder of a Type Rated HKAR-AMEL Licence in Category 'R'–Radioendorsed 'including GPWS' may issue Certificates of Release to Service inrespect of maintenance, excluding overhaul or scheduled maintenanceinspection, of Ground Proximity Warning Systems for aircraft for which thelicence is Type Rated in respect of its radio systems, subject to the limitationsof sub-paragraph 11.3.

12 Compass Compensation and Adjustment

The Paragraph 15 Type Rating of Airworthiness Notice No. 10 permits the issue ofCertificates of Release to Service by the holder in respect of the compensation andadjustment of direct and remote reading compasses on any aircraft not subject to therequirements of HKAR-1 Sub-section 1.8-13.

13 HKAR-66 Category A Aircraft Maintenance Licence

13.1 A HKAR-66 Category A Aircraft Maintenance Licence may be issued to aperson who has demonstrated a competence to act in the role of a linemaintenance certifying mechanic. The licence does not entitle the holder toexercise any certification privileges in respect of aircraft unless and until theholder is issued with a corresponding certification authorisation. Suchauthorisations will be issued by a HKAR-145 maintenance organisationappropriately approved by the Director-General.


NOTE: The holder of a HKAR-66 Category B1 licence is also qualified as a HKAR-66Category A licence holder in the same sub-category, e.g. Aeroplanes Turbine, andmay be issued with HKAR-66 Category A certification authorisation.

13.2 These HKAR-66 Category A privileges will be limited to the performance andcertification of specific simple maintenance tasks, either individually or incombination, as defined in HKAR-145 AMC 145.30(g) and will require acombination of theoretical and practical training to be undertaken on eachaircraft type to qualify for the task authorisation. Such authorisation, issuedby a HKAR-145 approved maintenance organisation will specify thelimitations of the privileges that may be applicable. HKAR-66 licenceholders will therefore be required to act in accordance with the authorisationprocedures of the company concerned.

13.3 HKAR-66 Category A licences are issued in licence sub-categories which are:

A1 Aeroplanes TurbineA2 Aeroplanes PistonA3 Helicopters TurbineA4 Helicopters Piston

14 HKAR-66 Category B1 Aircraft Maintenance Licence

14.1 A HKAR-66 Category B1 Aircraft Maintenance Licence may be issued to aperson who has demonstrated a competence to act in the role of a linemaintenance certifying engineer. The HKAR-66 Category B1 licence isprimarily intended to be used for the purposes of qualification of linemaintenance staff for authorisation. The licence, in its own right, does notentitle the holder to exercise any certification privileges in respect of aircraftand will be used in conjunction with a HKAR-145 certification authorisation.

14.2 Such authorisations will be issued by a HKAR-145 maintenance organisationappropriately approved by the Director-General. HKAR 145.30(g) requiresit to be used as a prerequisite for authorisation of staff acting as inspectors orsupervisors within base maintenance (base maintenance technicians).HKAR-66 licence holders will therefore act in accordance with theauthorisation procedures of the company concerned.

14.3 HKAR-66 Category B1 licences apply to all aircraft (aeroplanes andhelicopters) and are issued in licence sub-categories which are:

B1.1 Aeroplanes TurbineB1.2 Aeroplanes PistonB1.3 Helicopters TurbineB1.4 Helicopters Piston


NOTE: (1) An unrestricted HKAR-66 Category B1 sub-category entitles the holder tobe granted HKAR-66 Category A certification authorisations in the samesub-category, e.g. Aeroplanes Turbine.

(2) A HKAR-66 Category B1.2 Aeroplanes Piston certifying staff authorizationpermits the holder to exercise the privileges of the HKAR-66 Category B3subject to the HKAR-66 Category B3 wooden aeroplane limitation.

(3) HKAR-145 does not require a HKAR-66 Category C certifying staff for thecertification of simple light aeroplanes as Category B1.2 or B3 covers allmaintenance.

14.4 HKAR-66 Category B1 certification authorisations allow the holder to issueCertificates of Release to Service under HKAR 145.50 for line maintenanceon aircraft which are endorsed as individual types on the licence and thecorresponding authorisation. HKAR-66 Category B1 licences to the fullHKAR-66 standard include scope to allow the issue of a certificationauthorisation covering work on a combination of the following disciplines:

• airframe and their related systems;

• engines and their related systems (including Auxiliary Power Units);

• electrical power generation and distribution systems (power distribution inrespect of airframe and/or engine systems) including lighting systems;

• avionic line replaceable units (LRU).

In respect of avionic LRUs, the work is limited to cases where theserviceability of the system can be established by a simple self test facility(BITE) or by using simple test equipment and it is expected that, for referencepurposes, a list of such components will be prepared for each aircraft type bythe HKAR-145 approved maintenance organisation. (Defect rectification onavionic systems which requires an element of decision making in itsapplication – other than a simple go/no go decision – cannot be certified).

NOTE: The HKAR-66 Category B1 licence holder is not entitled to certify for any overhaulwork.

14.5 The certification authorisation can only be issued by a HKAR-145 approvedmaintenance organisation when the HKAR-66 licence holder has theappropriate basic sub-category listed and the aircraft type rating endorsed onthe HKAR-66 Aircraft Maintenance Licence. The type training for a HKAR-66 Category B1 type endorsement, conducted under a HKAR-147 approval,will represent the appropriate technologies as specified in HKAR-66. Thecertification authorisation will specify the privileges for the individual, givingdue regard to the company scope of approval and any associated proceduresagreed with the Director-General, and will specify any limitations to the


authorisation accordingly.

NOTE: A HKAR-66 licence issued on the basis of 'protected rights' may contain technicalrestrictions equivalent to the limitations of any HKAR-AMEL licence or companyauthorisations previously held. These 'protected rights' under HKAR-66 are acontinuation of certification privileges under an existing licence or certificationauthorisation which allows current personnel to continue working and certifyingwithout the need to re-qualify. Authorisations issued by a HKAR-145 approvedmaintenance organisation should therefore be similarly restricted in scope. Itshould be noted that conversion to the full HKAR-66 licence standard is optional.

14.6 HKAR-66 Category B1 licences may also be issued with an endorsementallowing the certification, under the provisions of Articles 9 and 11 of the AirNavigation (Hong Kong) Order 1995 as amended, for work outside of aHKAR-145 approved maintenance organisation on aircraft which are notoperated for commercial air transport. Such privileges are limited to HongKong registered aircraft only. Certifications may only be made for thoseaircraft types which are endorsed individually or as Group Type Ratings onthe licence. The privileges will reflect the limitations for the relevant licencecategories.

14.7 Where before conversion to a HKAR-66 licence a HKAR-AMEL licence washeld, any privileges relating to that licence under paragraphs 2.4, 4.5 or 6.5 ofthis Notice No. 3 remain valid for those aircraft for which a type rating washeld before conversion. The recognition of these privileges is shown by theinclusion of code 999 against that type rating.


15.1 A HKAR-66 Category B2 Aircraft Maintenance Licence may be issued to aperson who has demonstrated a competence to act in the role of a linemaintenance certifying engineer. The HKAR-66 Category B2 licence isprimarily intended to be used for the purposes of qualification of avionic linemaintenance staff for authorisation. The licence, in its own right, does notentitle the holder to exercise any certification privileges in respect of aircraftand will be used in conjunction with a HKAR-145 certification authorisation.

15.2 Such authorisations will be issued by a HKAR-145 maintenance organisationappropriately approved by the Director-General. HKAR 145.30(g) alsorequires it to be used as a prerequisite for authorisation of staff acting asinspectors or supervisors within base maintenance (base maintenancetechnician). HKAR-66 licence holders will therefore act in accordance withthe authorisation procedures of the company concerned.

NOTE: A HKAR-66 Category B2 licence cannot be used for the purposes of a HKAR-66Category A certification authorisation unless the HKAR-66 Category A licence isalso held.

15.3 HKAR-66 Category B2 certification authorisations allow the holder to issue


Certificates of Release to Service under HKAR 145.50 for the linemaintenance on aircraft which are endorsed as individual types on the licenceand the corresponding authorisation. HKAR-66 Category B2 licences to thefull HKAR-66 standard include scope to allow the issue of a certificationauthorisation covering work on a combination of the following aircraftsystems:

• instruments;

• automatic pilots (aeroplanes, helicopters and autoland systems);

• radio communication/navigation;

• radio radar;

• electrical power generation and distribution systems (power distribution inrespect of avionic systems) including lighting systems.

Scope is not included for authorisation in respect of work on electrical powerdistribution systems or electrical/avionic components in mechanical systems.(Licences issued on the basis of 'protected rights' may include such scopewhere so endorsed.)


15.4 The certification authorisation can only be issued by a HKAR-145 approvedmaintenance organisation when the licence holder has the appropriate basicHKAR-66 Category B2 listed and the aircraft type rating endorsed on theHKAR-66 Aircraft Maintenance Licence. The type training for a HKAR-66Category B2 type endorsement, conducted under a HKAR-147 approval, willrepresent the appropriate technologies as specified in HKAR-66. Thecertification authorisation will specify the privileges for the individual, givingdue regard to the company scope of approval and any associated proceduresagreed with the Director-General, and will specify any limitations to theauthorization accordingly.


15.5 HKAR-66 Category B2 licences may also be issued with an endorsementallowing the certification, under the provisions of Articles 9 and 11 of the Air


Navigation (Hong Kong) Order 1995 as amended, for work outside of aHKAR-145 approved maintenance organisation on aircraft which are notoperated for commercial air transport. Such privileges are limited to HongKong registered aircraft only. Certification may only be made for thoseaircraft types which are endorsed individually or as Group Type Ratings onthe licence. The privileges will reflect the limitations for the relevant licencecategories.


16.1 A HKAR-66 Category B3 Aircraft Maintenance Licence may be issued to aperson who has demonstrated a competence to act in the role of a certifyingengineer for maintenance of simple light aeroplanes. The licence, in its ownright, does not entitle the holder to exercise any certification privileges inrespect of aircraft and will be used in conjunction with a HKAR-145certification authorisation.

NOTE: HKAR-145 does not require a HKAR-66 Category C certifying staff for thecertification of simple light aeroplanes as Category B1.2 or B3 covers allmaintenance.

16.2 Such authorisations will be issued by a HKAR-145 maintenance organisationappropriately approved by the Director-General.

NOTE: A HKAR-66 Category B3 licence cannot be used for the purpose of a HKAR-66Category A certification authorization unless the Category A licence is also held.

16.3 HKAR-66 Category B3 certification authorisations allow the holder to issueCertificates of Release to Service under HKAR 145.50 for maintenance onsimple light aeroplanes which are endorsed as individual aeroplane types,aeroplane manufacturers group types, aeroplane group types and/or woodenaeroplane group types on the licence and the corresponding authorisation.HKAR-66 Category B3 licences to the full HKAR-66 standard include scopeto allow the issue of a certification authorisation covering work on acombination of the following disciplines:

• airframe and their related systems;

• engines and their related systems;

• electrical power generation and distribution systems (power distribution inrespect of airframe and/or engine systems) including lighting systems;

• avionic line replaceable units (LRU).

In respect of avionic LRUs, the work is limited to cases where theserviceability of the system can be established by a simple self test facility(BITE) or by using simple test equipment and it is expected that, for reference


purposes, a list of such components will be prepared for each aircraft type bythe HKAR-145 approved maintenance organisation. (Defect rectification onavionic systems which requires an element of decision making in itsapplication – other than a simple go/no go decision – cannot be certified).


16.4 The certification authorisation can only be issued by a HKAR-145 approvedmaintenance organisation when the licence holder has the appropriate basicHKAR-66 Category listed and the aircraft type rating endorsed on the HKAR-66 Aircraft Maintenance Licence. The type training for a HKAR-66Category B3 type endorsement, conducted under a HKAR-147 approval, willrepresent the appropriate technologies as specified in HKAR-66. Thecertification authorisation will specify the privileges for the individual, givingdue regard to the company scope of approval and any associated proceduresagreed with the Director-General, and will specify any limitations to theauthorization accordingly.


16.5 HKAR-66 Category B3 licences may also be issued with an endorsementallowing the certification, under the provisions of Articles 9 and 11 of the AirNavigation (Hong Kong) Order 1995 as amended, for work outside of aHKAR-145 approved maintenance organisation on aircraft which are notoperated for commercial air transport. Such privileges are limited to HongKong registered aircraft only. Certifications may only be made for thoseaircraft types which are endorsed individually or as Group Type Ratings onthe licence. The privileges will reflect the limitations for the relevant licencecategories.

17 HKAR-66 Category C Aircraft Maintenance Licence

17.1 A HKAR-66 Category C Aircraft Maintenance Licence may be issued to aperson who has demonstrated a competence to act in the role of a basemaintenance certifying engineer. The HKAR-66 Category C licence isprimarily intended to be used for the purposes of qualification of mechanicalor avionic maintenance staff for the issue of a certification authorisation forbase maintenance. The licence, in its own right, does not entitle the holder toexercise any certification privileges in respect of aircraft and will be used inconjunction with a HKAR-145 certification authorisation.


NOTE: HKAR-145 does not require a HKAR-66 Category C certifying staff for thecertification of simple light aeroplanes as Category B1.2 or B3 covers allmaintenance.

17.2 Such authorisations will be issued by a HKAR-145 maintenance organisationappropriately approved by the Director-General. HKAR-66 licence holderswill therefore act in accordance with the authorisation procedures of thecompany concerned.

17.3 HKAR-66 Category C certification authorisations allow the holder to issueCertificates of Release to Service under HKAR 145.50 following thecompletion of base maintenance on aircraft which are endorsed on the licenceand the corresponding authorisation as individual types. Such persons are inessence certifying for the completion of the process associated with basemaintenance and are supported by appropriately qualified and experiencedstaff, HKAR-66 Categories B1 and B2 base maintenance technicians, who willinspect and supervise the actual work. The scope of coverage thereforereflects the whole aircraft and is not limited to certification of solelymechanical or avionic systems.

17.4 It should be noted that a HKAR-66 Category C licence holder cannot beauthorised to act as a line maintenance certifying engineer, exercising linemaintenance certification privileges, nor as a base maintenance technician, inthe role of an inspector or supervisor clearing individual tasks, unless thelicence is also endorsed with the appropriate HKAR-66 Category B1 and/orB2 licence with the relevant type endorsements for that level (ATA 104 level3).

17.5 The certification authorisation can only be issued by a HKAR-145 approvedmaintenance organisation when the HKAR-66 licence holder has the basicCategory C listed and the aircraft type rating endorsed on the HKAR-66Aircraft Maintenance Licence. The type training for a HKAR-66 Category Ctype endorsement, conducted under a HKAR-147 approval, will represent theappropriate mix of systems knowledge as specified in HKAR-66. Thecertification authorisation will specify the privileges for the individual, givingdue regard to the company scope of approval and any associated proceduresagreed with the Director-General.

NOTE: A person qualified to HKAR-66 Category B1 or B2 level with type endorsementswill also be eligible for a Category C type authorisation, providing the basic HKAR-66 Category C licence is held.

18 HKAR-66 General

18.1 Holders of HKAR-66 Aircraft Maintenance Licence with type endorsementsmay be required to undertake appropriate differences type training where theaircraft type to be authorised embodies significant variations in the equipment


fitted or the aircraft systems configuration. The responsibility fordetermining the training to be undertaken will remain with the HKAR-145approved maintenance organisation.

19 Cancellation

This Notices cancels Airworthiness Notice No. 3 Issue 22, dated 30 May 2005, whichshould be destroyed.

Norman LODirector-General of Civil Aviation

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Civil Aviation Department Hong Kong, China Airworthiness Notice No. 3

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