MIL-I-8500D “MIL-I-8500C MILITARY...

MIL-I-8500D25 March 19EI0

Superseding“MIL-I-8500C

5 November 1971

MILITARY SPECIFICATION

INTERCHANGEABILITY AND REPLACEABILITYOF COMPONENT PARTS FOR AEROSPACE VEHICLES

This specification is approved for use by allDepartments and Agencies of the Department of Defense

1. SCOPE

1.1 Scope. This specification establishes the dimensional inter-changeability and replaceability requirements for certain parts,subassemblies, assemblies, units, sets, and installation provisionsfor aerospace vehicles (see 6.1), as listed herein, and which arecontrolled items as defined in paragraph 6.2.2, This specificationapplies to the aerospace vehicle and other elements as may bedefined herein, which are peculiar and must be integrated to pro-vide an operational weapon capable of effectively meeting theestablished performance requirements. These requirements areestablished to provide or promote easy and rapid assembly ofcontrolled items manufactured,by one or more sources, minimizelogistic requirements, assure usable parts, and conserve resources.It iz r.andatorythat interchangeability in accordance with this .specification shall be a design requirement during development ofan article. This specification shall be strictly complied withwhen incorporated (a) into any production contract for aerospacevehicles, and (b) into any aerospace vehicle development contractwhen such development will proceed to production, unless otherwisespecified in any said contract.

1.2 Classification. Interchangeability and replaceability asdefined and specif~ed herein shall be indicated for a specificarticle in terms of Interchangeability-Replaceability WorkingLists.

2. APPLICABLE DOCUMENTS

2.1 The following documents of the issue in effect on the date ofinvitation for bids or request for proposal form a part of thisspecification to the extent specified herein.

SPECIFICATIONS

Military

MIL-Q-9858 Quality Program Requirement

PSC-MISC

Downloaded from http://www.everyspec.com

MIL-I-8500D

DoD-D-1OOO Drawings, Engineering, and AssociatedLists

STANDARDS

Military

DoD-STD-1OO Engineering Drawing Practices

MIL-STD-280 Definitions of Item Levels, ItemInterchangeability, Models, and RelatedTerms

MIXJ-STD-480 Configuration Control - EngineeringChanges, Deviations, and Waivers

(Copies of specifications and standards required by contractors inconnection with specific procurement functions should be obtainedfrom the procuring officer.)

3. REQUIREMENTS

3.1 Interchangeability and Replaceability. This specificationsets ~orth certain controlled parts, subassemblies, assemblies,units, and sets (as defined in MIL-STD-280), installation provisionsfor equipment, major and minor segments of the airframe manufacturedseparate ful later asscm.bl;’or matlnq~ for which interchangeabilityand replaceability as defined is required.

;a:t Riiiw-” Working lists of such controlled items listingrs, nomenclature, and proposed status of the items, shall

be complied by or under the supervision of the prime designcontractor and submitted progressively to the procuring activity,beginning prior to preliminary fabrication of production tools anditems, for review and evaluation. The complete working list shallbe submitted to the procuring activity for approval on a semi-annual basis and after all controlled items therein, subject tofirst article inspection (see 4.3), have been certified, and shallbe approved prior to acceptance of the first aerospace vehicle.The working lists, after approval by the procuring =tivlty, shallreference this specification and shall be considered as meetingthe specific requirements of paragraph 3.3.1 and 3.3.2 thereof,and shall be incorporated by reference in the set of engineeringdrawings (see 3.4) and contract specifications defining the aero-space vehicle configuration. Working lists shall be kept current,during the extent as specified in paragraph 3.5, reflecting designchanges, additions, deletions, and aerospace vehicle effectivityserial numbers. Revisions shall be limited to affected pages onlyand there shall he no reissue of existing pages with date changeonly.


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3.2.1 Fores. The working list pages, listing controlled items~shall be prepared on contractor furnished forms in a format con-forming to Figure 1. Requests for additions, changes, and devia-tions to specification requiraents, still ~ prepared on con-tractor furnished forms in a format conforming to ‘Figure2. Thesize of all working list pages shall be comparable to either8* X 11 or 11 X 17 inch size and shall be kept uniform throughoutany current working list.

3.2.2 Contents. The contents of the working list shall include,but not be lmlted to; a preface, an index list of page numbers,and pages listing items controlled. The preface shall identifythe contractor and location, contract number, type/model/seriesof aerospace vehicl’eswith serial numbers ‘assigned,I&i?documentnumber, date, name of company approving official, and name of theGovernment quality assurance representative. The index listingshall have on each page, the I&R document n~~r and date- Thepage numbers shall be the basic part number of the controlleditem listed in alpha-numeric sequence. The preface shall be pre-pared by the contractor and submitted to the procuring activityfor approval prior to preparation of the controlled item listing.The controlled items listed should consist of those items definedin paragraph 3.3.1 and 3.3.2. Items defined in paragraph 3.3.1and 3.3.2 which for any reason should not be included in theworking list, may be excluded by appropriate referenCe and ex-planation in the preface. Proposed exceptions in status to itemsdefined in paragraph 3.3.1, shall be submitted for approval(see 3.2.1), and shall be covered by the contractor’s conciseS.tacemeiltsar)dSti~~G~ti~cJ info.~.atlo!? setting forth justificationfor each exception. The justification shall contain reasons fornoncompliance with the status requirements of this specificationand shall consist of statements of engineering, maintenance,production and tooling requirements; inadequacies or limitations;supported by drawings, sketches, diagrams, and interface data, asapplicable; and identification of special tools for installationif required. A statement of general requirements or criteria,e.9.r “aerodynamic smoothness requirements”, is not an explana-tory reason why the contractor cannot produce an item to meetthat requirement and is not satisfactory for evaluation forapproval. When approval for exceptions is requested, the remarkscolumn shall be used to give the following information (as appli-cable): justification as required above: type and amount ofrework prior to installation; actual (or estimated) manhourrequirements involved in rework; special tools for installation,if required. When prior approval of exceptions has been granted,a reference to the procuring activity’s correspondence grantingapproval of exceptions shall be entered in the remarks column.Likewise, references shall be made to the procuring activity’sdirectives to depart from the specification required status.Items required replaceable as defined in paragraph 3.3.2, shallhave listed in the remarks column; type and amount of rework

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required prior to installation; actual [or estimated) mnhourrequirements involved in rework; special tools for installation,if required.

3.2.2.1 New entries or changes. A new entry, or a previouslylisted entry which has been changed subsequent to approval of thecomplete working list, shall be identified by an asterisk. Allnew entries and changes submitted to the procuring activity forapproval (see 3.2.1), my be one or more of the fol~~win9:change in part number, name~ status, effectivity, remarks, ornotations of approval.

3.2.3 Submission. Working lisks and changes Lher.eto,furnishedin accordance with this specification, shall be subject to ini-tial inspection by the Government quality assurance-represent-ative. Obvious irregularities will be returned to the contractorfor correction prior to fomarding to the procuring activity forapproval.

3.2.4 &proval. Approval of the working list, including changesto the working list, and approval of exceptions once granted, aresubject to review, revocation, and further negotiation at therequest of the procuring activity as improved tooling techniques,controls, and facilities are established, or as maintenance andlogistics experience dictates. Applicable contracts will bereviewed and ‘modifiedby the parties to incorporate approvedchanges.

3.3 Controlled items. A1l controlled items, as defined in para-graph 6.2.2, shall be manufactured in accordance .with the primedesign contractor’s engineering data and information, and instrict conformity with all control media established by the primedesign contractor, as incorporated into applicable contracts.Subject to the provisions of paragraph 3.6.2, all controlleditems coming from any approved source, shall be in the sameinterchangeable or replaceable status as specified in the primedesign contractor’s approved working list and shall mate withadjacent items furnished by the same source or any other approvedmanufacturing source.

3.3.1 Interchangeability. Interchangeable controlled itemsshall comply with the definition established in paragraph 6.2.4.Shimming of-an interchangeable item is allowed when approved bythe procuring activity, and shall not be justification for class-ifying an item as replaceable. Only those tools generally avail-able to aerospace vehicle mechanics shall be required for instal-lation procedure. (This is not intended to preclude use ofspecial tools, fixtures and other shop aids during originalassembly of items in the article). All check installations ofcontrolled items shall provide for the maximum outline dimension-al requirements of the particular item involved, as set forth inthe applicable specifications or drawings. Jacking or other

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force applications using conventional equipment is allowable onlyto the extent necessary to position items ‘forinstallation, andshall not be used for forcing alignment when such forcing causespermanent deformation or distortion, tear~ng~ s~=ingt J=ndinglor damage to the item being checked or installed, or to anyadjacent items of the assembly or article on which a physicalcheck for fit is being conducted. When controlled items containcontrols, wiring~ hydraulic lines? etc., interchangeability shallbe provided at the attachments of these items to their nextassembly, as well as for the structural attachments of the assem-bly. The following controlled items, as may have been incorpor-ated into the design of the aerospace Vehiclef shall k inter-changeable with respect to any identical item conforming to theengineering data, tooling information, and control media estab-lished by the prime design contractor for the particular aero-space vehicle on contract:

a. Fixed, variable incidence, and variable sweep wingaircraft

Aerial refueling assemblies

Aileron assemblies

Air conditioning system units

Air inlet rams

Armament supporting parts and att~chmerJLfittings,brackets, etc.

Arresting gear

Aspirators

and barrier gear

Auxiliary aerodynamic surfaces

Auxiliary fuel tanks and fittings

Bomb bay doors

Cargo pods .

Cockpit enclosure (units and subassemblies thereof)

Catapult hooks

Control columns

Control horns, masts, and brackets where attached bybolts

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Control surface tabs

Control system parts such as bellcraksf con-ol a~stwalking beams, push-pull rods, eccentric shaaves,shafts, and similar related p=-

Dive brakes

Drag parachute assmblies~ release and jettisonmechanism, and carsp=tment

Ducting

Electrical system units

Elevator assemblies

Elevator tips

Eleven assemblies

Engine cowling

Engine mount assemblies

Exhaust collector assemblies and subassemblies

Fillets, cowling gun access doorsl fuel tank accessdoors, and gap covers that require removal for servicingand maintenance operations

Fin assemblies

Fire protection system units

Flap assemblies

Floats

Flooring

Fuel system units

Fuel tanks or cells

Fuselage entrance and exit doors and escape hatches

Fuselage sections joined with screws or bolts (such asnose section or tail section)

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Glider or target tow assemblies - attachment and release

Hoisting fittings

Hydraulic system units

Inspection doors, plates, and panels

Instrument panels

Intercoolers

JATO attaching fittings

Landing gear pods

Loading ramp assemblies

Main landing gear assembly

Main landing gear closure doors

Nacelle structures, when bolted

Nose or tail wheel landing gear assembly

Nose or tail wheel landing gear closure doors

ail tsrlkSr C211S

Oil temperature regulators

Oxygen system units

Pedestal assemblies

Pitot static units (external)

power plant installation (wick-change feature)

Power pods

Pressurization system units

Propulsion system air intakes

Provisions for government furnished property

Pylons

Radomes, astrodomes, and similar enclosures

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Rudder assetilies

Rudder tipS

Ruddevator assemblies

Seats

Shock absorber assemblies

Skid assemblies

Slat assemblies

Speed brake assemblies

Spoiler assemblies

Stabilator assemblies

Stabilator tips

Stabilizers

Stabilizer assemblies

Stabilizer leading edges

Stabilizer tips

Stangs

Tail cones

‘I’ailpipes

Thrust reverse doors

Turrets

Vane assemblies

Vortex generator structures

Wing assemblies

Wing leading edge assemblies

Wing t~p assemblies

Wing trailing edges

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All other items that are part of the aircraft or ‘integral assemblies to be attached to the aircraft shallbe interchangeable if they have characteristics similarto those listed above. This does not apply to itemsspecified to have replaceability as defined herein(see 3.3.2).

b. Rotary wing aircraft

Aerial refueling assemblies

Aileron assemblies

Armament supporting parts and attachment fittings,brackets, etc.

Auxiliary aerodynamic surfaces

Cargo pods

Cockpit

Control

Controlbolts

Controlwalkingshafts,

Cooling

enclosure (units ad subassemblies thereof)

columns

horns, masts, and bracketst where attached bY

system parts such as bellcranks, control arm,be~s, push-p~~l rods, eceen~ric ~h~aves?and similar xelated parts

fan and clutch assemblies

couplings-clutch, driveshaft? and UJIiverSalS

Drive shafts

Ducting

Electrical system units

Elevator assemblies

Elevator tips

Engine cowling


Exhaust collector assemblies and subassemblies

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MIL-S-B500D

Fillets, cowling, fuel tank accessthat require removal for servicingoperations

Fin assemblies

Fire protection system units

Floats

Flooring

Fuel tanks or cells

doors, and gap coversand maintenance

Fuselage entrance and exit doors and escape hatches

Fuselage sections joined with screws and bolts (such asnose section and tail section)

Gear boxes - main, intermediate, tail

Glider or target tow assemblies - attaching and releas-ing

Hoisting fittings

Hydraulic system units


Instrument panels


Nacelle structures, when bolted


Oil tanks or cells

Oil temperature regulators

Oxygen system units

Pedestal assemblies

power plant installation (quick change features)


Pylon assemblies

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Radomes, astrodomes, and similar enclosures

Rescue hoists

Rotor blades, main and tail (individually)

Rotor hub and’assemblies

Rudder assemblies

Rudder tips

Seats

Shock absorber assemblies

Skid assemblies

Sponson assemblies


Stabilizer tips

Tail cones

All other items that are part of the aircraft orintegral assemblies to be attached to the aircraft shallbe ill&rchangeable if the;’ have rharaet.eristicssimilarto those listed above. This does not apply to itemsspecified to have replaceability as defined herein(see 3.3.2).

c. Unmanned aircraft

Control horns, masts, and brackets, where attached bybolts

Control surface assemblies

Control system parts such as bellcranks, control arms,push-pull rods, eccentric sheaves, shafts, and similarrelated parts

Engine cowling


External fittings such as launching fittings, handlingand hoisting fittings, JATO or booster fittings


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d.

Fillets, cowling, and fuel tank access doors that re-quire removal for servicing and maintenance operations

All packaged operating components or items of theguidance and control systems

Fuel tanks

Fuselage sections



Main landing gear closure doors


Nose or tail wheel landing closure doors

Oil tanks


Recovery system parts (parachute, explosive actuators,etc.)

Shock absorber assmblies

Skid assemblies


Tail cones

Wing assemblies

All other items that are part of unmanned aircraft orintegral assemblies to be attached to the aircraftshall be interchangeable if they have characteristicsstiilar to those listed above. This does not applyto items specified to have replaceability as definedherein (see 3.3.2).

Missiles

(1) Other than ballistic type missiles

Interchangeability shall be at designated pointsonly and within space limitations

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All airframe sections which are packaged andshipped separately and assembled by using organ-izations

.-All installation provisions for support equipment

All motors, batteries, generators~ in~ert=slregulators, and like items

All movable surfaces which are part of thesesections

All paakaged operating components or items of theguidance control system such as gyros, servos, andsimilar items

All pumps, valves, accumulators, actuators,cylinders, and like items

All provisions for warhead and fusing components

Control system parts such as bellcranks, controlarms, push-pull rods, shafts, and similar relatedparts

External fittings for devices such as launchingfittings, handling and hoisting fittings

JATO or booster.fittings, and similar it-s---

. Provisions for government furnished property

Radomes

(2) Ballistic type missiles

Airframe sections at designated stations

All external fittings and fixtures providinginterface connections for servicing and launch

All installation provisions for support equipment

All packaged operating components or items of theguidance and control system, such as gyros,computers, platforms, acceleraeters, servo units,telemetric devices, and similar items

All pumps, valves, disconnects, actuators, cylin-ders, and like items

Engines - stage, booster, sustainer, and vernier


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Fai.rings


Large plumbing and conduits which may requirefabrication of original or placement parts at thelaunch site or otherwise than under the control ofthe vehicle prime contractor

Nose cones (warheads, re-entry vehicles)t adaptersland fairings

Pressure tanks such as hydrogen, nitrbgen, etc.

All other items that are part of the missile orintegral assemblies to be attached to the missileshall be interchangeable if they have character-istics similar to those listed above. This doesnot apply to items specified to have replaceabilityas defined herein (see 3.3.2).

3.3.2 Replaceability. Replaceable controlled items shall complywith the definition established in paragraph 6.2.9. Replaceableitems identified as spares or potential spares shall be designedto permit replacement under field maintenance conditions. Alter-ation of adjoining items or structure during replacement ofreplaceable items originally installed is not authorized. Shim-ming ot a replaceable item is ~lbwed wheri approved by the Prc-curing activity. The following controlled items, aS may havebeen incorporated into the design of the aerospace vehicle, shallbe replaceable with respect to any identical item conforming tothe engineering data, tooling information, and control mediaestablished by the pr~me design contractor for the particularaerospace vehicle on contract. The degree of replaceability ofsaid controlled items shall be determined by the procuringactivity:

a. Fixed, variable incidence, and variable sweeP win9aircraft

Fillets

pairings

Wing and empennage attachment fittings with respect toinstallation on the wing or empennage surfaces

Sections of wings, fuselage, and empennage assembled bymanufacturing (permanent and semi-permanent) joints

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Control horns, masts, and brackets, where attached byrivets

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All items that are part of the aircraft or integralassemblies to be attached to the aircraft shall bereplaceable if they have characteristics similar tothose listed above.

b. Rotary wing aircraft--as approved by the procuring act-ivity

c. Unmanned aircraft--as approved by the procuring activity

d. Missiles--as approved by the procuring activity

3.4” Engineering drawinqs

3.4.1 Preparation. Engineering drawings for controlled itemsshall be prepared to conform to the requirements of Level 3 asspecified in DoD-D-1OOO.

3.4.2 Drawinq notes. The approved interchangeable or replace-able status of each controlled item and the rework of same, whenapplicable, shall be included in the Uawin9 notes of drawin9sfor all controlled items. Drawings shall specifically identifythese features, such as hole patterns, contour, etc. which requirecontrol to maintain interchangeability.

3.4.3 Item ~dentification. The item identification and partnumber requirements of DoD-STD-1OO shall govern the contractor’spart numbering and changes thereto for controlled items.

3.5 Extent. The interchangeability and replaceability required.. by th~cification shall be maintained, where practical,throughout the complete model of the aerospace vehicle manufac-tured under the basic contract. Production action on controlleditems, covered by request for deviation authority, shall not betaken by the contractor prior to receipt of that authority fromthe Government contracting officer, designated by the procuringactivity, to deviate from the requirements of this specification.

3.6 Responsibility

3.6.1 Production control media. As may be specified in theschedule of the basic contract, the prime design contractor shallbe responsible for providing the prime contractor, subcontractor,and in the event of a licensee program under Government auspices,the prime licensee contractor with the necessary control media,such as, current tool drawings, templates fixtures, 9a9esrduplicate masters, and other devices or appliances as specifiedin the applicable contract(s) . All such production control mediashall have dimensional accuracy and correct utilization verifiedas specified in paragraph 4.

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3.6.2 Supervision. As may be specified in the schedule of thebasic contract, the prime design contractor shall be responsiblefor the general technical supervision of work being performed bythe prime contractor and other manufactur~ng sources to assurethat interchangeability or replaceability as required herein, isbeing maintained. The prime contractor shall be responsible forintegrating and implementing an acceptable interchangeability-re-placability program unless otherwise specified in the contract.

3.6.3 Changes. As may be specified in the schedule of the basiccontract, all changes which affect interchangeability or replace-ability of the item, as required by the working lists or changesrequiring development of new control media, shall be referred bythe manufacturing source proposing the change to the procuringactivity through the prime contractor and the prime designcontractor. The prime design contractor shall be responsible foran analysis of all changes which affect interchangeability orreplaceability of the item, as required by the working list,together with the submittal of his comments as to the acceptabil-ity of the suggested change to the procuring activity. Theengineering responsibility for the change will be vested in theprime design contractor in the event interchangeability or re-placeability is involved; no change shall be made by one manu-facturing source without the same change being made by all othermanufacturing sources of the same item. The requirements ofparagraph 3.2.2 shall apply to all changes.

3.6.3.1 Submittal of changes. Requests for design Changes snalibe in accordance with MIL-STD-480. Approval of a request fordesign change shall constitute authority to effect sa~d changeonly, and shall not finalize the interchangeability or replace-ability status of the item(s) involved. Finalizing the status ofthe item(s), and other changes, shall be processed as specifiedherein.

3.6.3.2 Emergency deviations. Requests for emergency deviationsto working llsts may be made by teletype, telephone, personalcontact, or other expeditious means. All communications shall beidentified by the 1&R document number and part number affected.If the initial communication regarding requested deviation was byother than written message, it shall be confirmed by writtenmessage within 48 hours, and followed by a formal change requestwithin 15 calendar days after the first communication.

3.7 First article. Controlled items shall be inspected, asspeci?ied in paraqraph 4, for conformance with the interchange-ability or replaceability requirements as specified herein, oras listed in the working llst, prior to proceeding into contin-uous production under the basic contract.


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4. QUALITY ASSURANCE PROVISIONS

.—4.1 Responsibility for inspection. -Unlessotherwise specifiedin the contract, the contractor shall be responsible for theinterchangeability or replaceability of all items as approved bythe procuring activity, or as shown in the approved working list,and shall establish an effective quality program to assure corn-”pliance with this specification. Such.program shall iccludeQuality program Management, Facilities and standards, and Manu-facturing Control conforming to MIL-Q-9858. The Governmentreserves the right to perform any of the inspections set forth inthis specification where such inspections are deemed necessary toassure conformance to pr.escr,ibedrequirements..

4.2 Classification of inspections. The inspection requirementsspecified herein are as follows:

a. First article inspection (see 4.3)

b. Quality conformance inspection (see 4.4)

c. Control media inspection (see 4.5)

4.3 First article inspection. Each controlled item shall beinspected during installation on the first aerospace vehicle,selected for first article inspection, to determine the degreeof conformance to the interchangeability or replaceabilityrequirement for that item. Certification of conformance tointerchangeability or replaceability requirements, as specifiedherein, or as listed in the working list, shall be furnished tothe Government contracting officer, designated by the procuringactivity, on completion of first article inspection installationof all controlled items, Nonconforming items that cannot becorrected shall be listed on Interchangeability Document ChangeRequests (see 3.2.1) and submitted as specified in paragraph3.2.2.

4.4 Quality conformance inspection. Proof of compliance withinterchangeab~l~ty or replaceability requirements, subsequent tothe first article inspection, shall be established by scheduledinstallation of controlled items. The schedule for demonstrationsshall be negotiated with the Government contracting officerdesignated by the procuring activity. Demonstrations shall requirecontractor certification, with noncomplying items being replaced,as may be specified in the contract. Certification or correctiveactions shall be furnished aforesaid Government contractingofficer.

4.5 Control media. Control media such as control masters, shop-masters, templates, fixtures, gages, and other devices orappliances that are used to maintain interchangeability or replace-

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ability as required herein, shall be inspected and maintained inaccordance with the requirements of MIL-C?-9858.

4.6 Government inspection at other manufacturing sources. TheGovernment reserves the right to inspect controlled items manu-factured and the control media used at other manufacturing sourcesunder the basic contract.

5. PREPARATION FOR DELIVERY

5.1 The data required by this specification shall be preparedfor delivery in accordance with the requix.ementsof the procuringactivity under the basic contract.

6. NOTES

6.1 Intended use and application. This specification is intendedfor use on contracts for (a) the manufacture of operational aero-space vehicles, and (b) the modification of inservice aerospacevehicles (Class I changes, as defined in MIL-STD-480) that alter,add or replace controlled items as defined herein. Contracts foraccomplishing changes on inservice aerospace vehicles should specifythe degree of conformance to the requirements as specified herein,based on the magnitude of the change and the quantity of aerospacevehicles involved. Unless otherwise specified, the requirementsof this specification should (a) apply to prototype/developmentvehicles on contracts for modification of inservice aerospacevehicles, and (b) not apply to contracts for experimental/servicetest/development aerospace vehicles or Army missiles.

6.2 Definitions

6.2.1 Aerospace vehicle. As used in this specification, an “aero-space vehicle” 1s any machine or craft designed to travel throughthe air, given lift by dynamic reaction of air particles over andabout its surfaces, or by reaction to a jet stream or other fluidjet.

6.2.2 Controlled item. As used in this specification, the term“controlled item” denotes a part, assembly, subassembly, unit, set,segments of the airframe? or any other physical element of the aero-space vehicle, that is identified by a part number, and iscontrolled in manufacture by means of control media. The termmay also denot installation provisions for such items when theseprovisions are controlled by means of control media.

6.2.3 Control media. As used in this specification, “control media”is toolim such as control masters, shopmasters, fixturesl gages,templates; and other devices or appliances necessary for main-taining interchangeability or replaceability as required by thisspecification.

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6.2.4 Interchangeability. As used in this specification, “inter-changeabil~ty” applies to “.intierchangeableitems” that aremanufactured with the aid of controlled media,,and require onlythe application of attachiwmeans for their installation. Inter-changeable items shall be capable o f being readily installed,removed, or replaced without alteration~ misalignment~ or damageto items being installed or to adjoining items or structure.

6.2.5 Interchan~eability document chanqe request. As used in thisspecification, an “Interchangeability Document Change Request”(IDCR) is a document used to request an addition or change to anitem in the working list, after said list has been approved by theprocuring activityw or when a deviation to specification require-ments is required.

6.2.6 Other manufacturing sources. As used in this specification,“other manufacturing sources” applies to any approved sources otherthan the prime design contractor or the prime contractor. Othermanufacturing sources may include affiliate contractors~ sub-contractors, and others who fabricate parts for inclusion in thearticles assembled by the prime contractor.

6.2.7 Prime contractor. As used in this specification, “primecontractor” appl~es to that contractor having the prime or basiccontract to furnish to the Government the articles to which thisspecification applies, and wherein the specification is specificallyincorporated and identified.

6.2.8 Prime design contractor, As used in this specification,“prime design contractor” applies to the designer, or propriety, broriginal manufacturer of the original article as specified in thecontract.

6.2.9 Replaceability. As used in this specification, “replace-ability” applies to “replaceable items” that are manufactured withthe aid of controlled media, and the installation of which requiresalterations of the items in addition to the normal application andmethods of attachment. Such alterations may include drilling,reaming, cutting, filing, trimming, bending, shaping, etc.

6.2.10 Working list. As used in this specification, the “workinglist” is a document containing on each page one or more items re-quiring control media to maintain interchangeability or replace-ability as defined in this specification, and listing pertinentinformation related to the item(s) listed.

6.3 Supersession data. This issue of MIL-I-8500 for new contractsfor aerospace vehicles. Previous issues of MIL-I-8500 on contractsin force on the date of this specification remain in effect untiltermination of said contracts.

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MIL-I-8500D

Notice. When Government drawings, specifications, or other dataare used for any prupose other than in connection wikh a definitelyrelabed Government ‘procurementoperation, the United Stabes GovIsn-ment thereby incurs no responsibility nor any obligation whatsoever:and the fact that the Government may have formulated, furnished, orin any way supplied the said drawings, specifications, m otierdata are not to be regarded by implication or otherwise as in anymanner licensing the holder or any other person or corporation,or conveying any rights or permission to manufacture, use or sellany patented invention that may in any way be related thereto.

custodians : Preparing Activity:

Army -------AV Air Force--99

Navy-------As (Project MISC-0C06)

Air Force--99

Reviewer Activity

Army------+x

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FIIIST CLASS ●ERMIT NO 73236 wASMING1ON D C

K$$AGE WILL BE PAID BY TIIE OEPAHTMENT OF THf AIR FORCE

H~ AF’LCCASO/LODSFederalCenterBattle Creek,MI 49016


Date post:	15-Jun-2018
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