AIRBUS ENGIN OUT AND AUTO RELIGHT

Engine flame out and auto relight

VITU-BARBIER NicolasFlight Operations Engineer

Presented by:

April 2007Engine flame out and auto relight Page 2©AI

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Content

Review of engine auto relight function

Review of ECAM STATUS

Electrical architecture

Hydraulic architecture

Operational documentation

Conclusion


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Content






Conclusion


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Engine flame out processEngine flame out process

• A flame out occurs when the combustion process stops due to:

Heavy rain, hail, icing, ice crystalsEngine stallVolcanic ash encounteredFuel starvationControl system malfunctions

• Flight crew is warned of a flame out:By ECAM caution/warning (if applicable)When there is a rapid decrease in engine parameters


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Engine flame out eventsEngine flame out events

• Over the last two years several flame out occurredSingle flame outsDual flame out on A330

• In each case engines automatically relit

Good reliability Good reliability of of the the auto auto relight functionrelight function

• Lead to questions regarding the selection of IGN/START when flame out conditions are suspected

• FADEC logic evolutions and in service event analysis


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Automatic ignition logicAutomatic ignition logic

FADEC

Flameout detectedALL FADEC

Master lever cycled

ALL

NAI ONDepends on FADEC

std

APP IDLEDepends on FADEC

std

TakeoffDepends on FADEC

std

Stall/SurgeDepends on FADEC

std

Severe rain/Hail

Depends on FADEC std


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Automatic ignition logic (ContAutomatic ignition logic (Cont’’d)d)

• As soon as a flame out condition is detected, FADEC automatically select continuous ignition

Airbus does not recommend setting the engines rotary Airbus does not recommend setting the engines rotary selector in the IGN/START position when inclement selector in the IGN/START position when inclement

weather conditions are encountered in cruiseweather conditions are encountered in cruise

• Selecting IGN/START (continuous ignition) does not helppreventing flameout

• Not Selecting IGN/START when inclement weatherconditions are encountered:

Saves igniter’s life

Ensures good igniters’ reliablity


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Content






Conclusion


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A330/A340 familyA330/A340 family

A320 familyA320 family


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Content






Conclusion


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Review of ECAM STATUS – Electrical architecture

A330/A340 familyA330/A340 family• Basic configuration

AC ESS

AC 1

GEN 1

IDG 1

ESS TR

AC 2

TR 1 TR 2

DC 2

GEN 2

IDG 2

emergency generator

DC 1 DC ESS

DC ESS SHED

DC LAND RCVRY

AC LAND RCVRY

AC ESS SHED

A330 example


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AC ESS

AC 1

GEN 1

IDG 1

ESS TR

AC 2

TR 1 TR 2

DC 2

GEN 2

IDG 2

DC 1 DC ESS

DC ESS SHED

A330/A340 familyA330/A340 family• All engine Flame out• Emergency generator on RAT (no hydraulic engine driven pumps and

windmilling insufficient

DC LAND RCVRY

AC LAND RCVRY

AC ESS SHED

A330 example

emergency generator


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AC ESS

ESS TR

DC ESS

DC LAND RCVRY

emergency generator

AC 1

GEN 1

IDG 1

TR 1

DC 1

TR 2

DC 2

DC ESS SHED

AC ESS SHED

A330/A340 familyA330/A340 family• Engines recovered• Emergency generator on hydraulic engine driven pump

AC LAND RCVRY

A330 example

AC 2

GEN 2

IDG 2


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A330/A340 familyA330/A340 family

emergency generator

Generators Bus bars available• AC ESS

• DC ESS

•• AC LAND RCVRYAC LAND RCVRY

•• DC LAND RCVRYDC LAND RCVRY

Bus bars still lost

All engine lostAll engine lost

Engines recoveredEngines recovered

A330 example

emergency generator

Generators Bus bars recovered

• AC 1 & 2• DC 1 & 2

GEN 1

IDG 1

• AC & DC ESS

• AC & DC ESS SHED

Eng 1 & 2

GEN 2

IDG 2


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A330/A340 family ECAM STATUSA330/A340 family ECAM STATUSLAND RECOVERY……..ON

Pressing LAND RECOVERY…ON

AC & DC LAND RCVRY bus bar recovered

ILS1, BSCU1, LGCUI1, SFCC1…are recovered

Landing using ILS possible (when no MMR)

EGPWS receive landing gear position info


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Wording modification studied:– .BEFORE SLATS EXTENSION

– .AT SLATS EXTENSION

– .JUST BEFORE SLATS EXTENSION

A330/A340 family ECAM STATUSA330/A340 family ECAM STATUS

.FOR SLATS EXTENSION– Since SFCC2 is recovered when engines are recovered, Slats/Flaps can be

normally extended


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.BEFORE SLATS EXTENSION– Risk to set LAND RECOVERY ON too early (TOD)

• If no engine recovered, electrical load balance no longer guaranteed• Fuel pumps shed too early

.AT SLATS EXTENSION– Risk that flight crews try to extend Slats/Flaps before setting LAND

RECOVERY ON (no engine recovered)

.JUST BEFORE SLATS EXTENSION– Less clear than current wording


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AC & DC LAND RCVRY BUS bars are still shed

“LAND RECOVERY…….ON” still required

“FOR SLATS EXTENSION” current wording kept

A330/A340 family summaryA330/A340 family summary

Following all engine flameout, when at least one engine is recovered:

Apply ECAMApply ECAM


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A320 familyA320 family• Basic configuration

AC ESS

AC 1

GEN 1

IDG 1

AC 2

TR 1 TR 2

DC 2

GEN 2

IDG 2

emergency generator

DC ESS SHED

AC ESS SHED

DC ESSDC 1


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AC ESS

AC 1

GEN 1

IDG 1

ESS TR

AC 2

TR 1 TR 2

DC 2

GEN 2

IDG 2

DC 1

emergency generator

A320 familyA320 family• All engine Flame out• Emergency generator on RAT (no hydraulic EDP, windmilling insufficient)

AC ESS SHED

DC ESS SHED

DC ESS


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A320 familyA320 family• Engines recovered• Emergency generator on hydraulic engine driven pumps

AC 1

GEN 1

IDG 1

AC 2

TR 1 TR 2

DC 2

GEN 2

IDG 2

DC 1

AC ESS

ESS TR

emergency generator

AC ESS SHED

DC ESS SHED

DC ESS


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A320 familyA320 family

emergency generator

Generators Bus bars available• AC & DC ESS

• AC & DC ESS SHED

NILNIL

Bus bar still lost

All engine lostAll engine lost

Engines recoveredEngines recovered

• AC & DC ESS

• AC & DC ESS SHEDemergency generator

Generators Bus bars recovered

• AC 1 & 2• DC 1 & 2

GEN 1

IDG 1

Eng 1 & 2

GEN 2

IDG 2


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• No shed bus bar until landing (or landing gear extension)• Only the MIN RAT SPEED remains displayed

RAT is still extended

A320 family summaryA320 family summary

Following all engine flameout, when at least one engine is recovered:



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Content






Conclusion


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Review of ECAM STATUS – Hydraulic architectureA330/A340 familyA330/A340 family• Basic configuration

3000 psi 3000 psi 3000 psi

A330 example


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Review of ECAM STATUS – Hydraulic architectureA330/A340 familyA330/A340 family• All engine flame out, RAT extension

2500 psi 0 psi 0 psi

A330 example


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Review of ECAM STATUS – Hydraulic architectureA330/A340 familyA330/A340 family• Recovery of one engine, RAT still out

3000 psi 0 psi3000 psi

A330 example


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Review of ECAM STATUS – Hydraulic architecture

A330/A340 family ECAM STATUSA330/A340 family ECAM STATUSEngine 1 recovery (A330 example)• Green hydraulic Engine Driven Pump 1 (EDP 1) recovered

EDP1 takes over the Green hydraulic pressurization• Blue hydraulic recovered.• However the ECAM STATUS still shows the following:


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• Current ECAM logic aims at covering all cases

Engines recoveredEngines not recovered

• Extending the landing gear by gravityMinor consequences (nose wheel steering loss)



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Review of ECAM STATUS – Hydraulic architectureA320 familyA320 family• Basic configuration

3000 psi 3000 psi 3000 psi


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Review of ECAM STATUS – Hydraulic architectureA320 familyA320 family• All engine flame out, RAT extension

0 psi 2500 psi 0 psi


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Review of ECAM STATUS – Hydraulic architectureA320 familyA320 family• Recovery of one engine, RAT still out

3000 psi 3000 psi 3000 psi

OFF


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A320 family ECAM STATUSA320 family ECAM STATUSEngine 1 recovery (example)

ECAM STATUS only displays the RAT limitation



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Content






Conclusion


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Review of ECAM STATUS – Operational documentation

FCOM EnhancementsFCOM Enhancements

The ELEC EMER CONFIG procedure after engine/generator recovery

The ENG ALL ENG FLAME OUT/ ENG DUAL FAILUREprocedures after all engine recovery

Minor FCOM volume 1 clarifications

QRH EnhancementsQRH Enhancements

The ENG ALL ENG FLAME OUT/ ENG DUAL FAILUREprocedures after all engine recovery


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FCOM EnhancementsFCOM EnhancementsELEC EMER CONFIG

A330A340


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FCOM EnhancementsFCOM EnhancementsELEC EMER CONFIG (Cont’d)

A330A340


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FCOM EnhancementsFCOM EnhancementsENG ALL ENG FLAME OUT/ ENG DUAL FAILURE

A320A330

A340


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FCOM EnhancementsFCOM EnhancementsENG ALL ENG FLAME OUT

A330A340


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QRH EnhancementsQRH EnhancementsDUAL FAILURE / ALL ENG FLAME OUT A320

A330A340


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Content






Conclusion


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Conclusion

• FCOM/QRH have been enhanced to take into account engine(s)/generator(s) recovery after the loss of all the engines/generators

• Confident in auto relight function

• Current ECAM procedure ensures safe aircraft operation


Proprietary document. By taking delivery of this Presentation (hereafter “Presentation”), you accept on behalf of your company to comply with the following. No other property rights are granted by the delivery of this Presentation than the right to read it, for the sole purpose of information. This Presentation, its content, illustrations and photos shall not be modified nor reproduced without prior written consent of Airbus S.A.S. This Presentation and the materials it contains shall not, in whole or in part, be sold, rented, or licensed to any third party subject to payment or not. This Presentation may contain market-sensitive or other information that is correct at the time of going to press. This information involves a number of factors which could change over time, affecting the true public representation. Airbus assumes no obligation to update any information contained in this document or with respect to the information described herein. The statements made herein do not constitute an offer or form part of any contract. They are based on Airbus information and are expressed in good faith but no warranty or representation is given as to their accuracy. When additional information is required, Airbus S.A.S can be contacted to provide further details. Airbus S.A.S shall assume no liability for any damage in connection with the use of this Presentation and the materials it contains, even if Airbus S.A.S has been advised of the likelihood of such damages. This licence is governed by French law and exclusive jurisdiction is given to the courts and tribunals of Toulouse (France) without prejudice to the right of Airbus to bring proceedings for infringement of copyright or any other intellectual property right in any other court of competent jurisdiction.

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AIRBUS ENGIN OUT AND AUTO RELIGHT

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