Presented by:
VITU-BARBIER Nicolas Flight Operations Engineer
Engine flame out and auto relight
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation
Ò Conclusion
Engine flame out and auto relight
April 2007
Page 2
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 3
Review of engine auto relight function Engine flame out process
• A flame out occurs when the combustion process stops due to: rain, hail, icing, ice crystals Engine stall Volcanic ash encountered Fuel starvation Control system malfunctions © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Heavy
• Flight crew is warned of a flame out: By
ECAM caution/warning (if applicable) When there is a rapid decrease in engine parameters Engine flame out and auto relight
April 2007
Page 4
Review of engine auto relight function Engine flame out events
• Over the last two years several flame out occurred Single
flame outs Dual flame out on A330
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
• In each case engines automatically relit • FADEC logic evolutions and in service event analysis Good reliability of the auto relight function
• Lead to questions regarding the selection of IGN/START when flame out conditions are suspected Engine flame out and auto relight
April 2007
Page 5
Review of engine auto relight function Automatic ignition logic APP IDLE Depends on FADEC std
Flameout detected ALL FADEC
Stall/Surge Depends on FADEC std
NAI ON Severe rain/Hail
Depends on FADEC std
Depends on FADEC std
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
FADEC Master lever cycled
Takeoff Depends on FADEC std
Engine flame out and auto relight
ALL
April 2007
Page 6
Review of engine auto relight function Automatic ignition logic (Cont’d)
• As soon as a flame out condition is detected, FADEC automatically select continuous ignition
• Selecting IGN/START (continuous ignition) does not help preventing flameout
• Not Selecting IGN/START when inclement weather conditions are encountered: © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Saves
igniter’s life
Ensures
good igniters’ reliablity
Airbus does not recommend setting the engines rotary selector in the IGN/START position when inclement weather conditions are encountered in cruise Engine flame out and auto relight
April 2007
Page 7
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 8
Review of ECAM STATUS
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
A330/A340 family
A320 family
Engine flame out and auto relight
April 2007
Page 9
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 10
Review of ECAM STATUS – Electrical architecture A330 e x am ple
A330/A340 family • Basic configuration
DC 1
DC 2
DC ESS DC ESS SHED AC LAND RCVRY
TR 2
TR 1 ESS TR AC ESS SHED
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
DC LAND RCVRY
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 11
Review of ECAM STATUS – Electrical architecture A330 A330/A340 family e x am • All engine Flame out ple • Emergency generator on RAT (no hydraulic engine driven pumps and windmilling insufficient DC 1
DC 2
DC ESS DC ESS SHED AC LAND RCVRY
TR 2
TR 1 ESS TR AC ESS SHED
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
DC LAND RCVRY
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 12
Review of ECAM STATUS – Electrical architecture A330 A330/A340 family e x am • Engines recovered ple • Emergency generator on hydraulic engine driven pump DC 1
DC 2
DC ESS DC ESS SHED AC LAND RCVRY
TR 2
TR 1 ESS TR AC ESS SHED
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
DC LAND RCVRY
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 13
Review of ECAM STATUS – Electrical architecture A330 e x am ple
A330/A340 family All engine lost Generators emergency generator
Bus bars available • AC ESS • DC ESS
Engines recovered Generators © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
GEN 1
GEN 2
Bus bars recovered • AC 1 & 2 • DC 1 & 2
IDG 2
Eng 1 & 2
IDG 1
emergency generator
Engine flame out and auto relight
Bus bars still lost • AC LAND RCVRY • DC LAND RCVRY
• AC & DC ESS • AC & DC ESS SHED April 2007
Page 14
Review of ECAM STATUS – Electrical architecture A330/A340 family ECAM STATUS LAND RECOVERY……..ON Pressing LAND RECOVERY…ON AC & DC LAND RCVRY bus bar recovered
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ILS1, BSCU1, LGCUI1, SFCC1…are recovered
Landing using ILS possible (when no MMR)
Engine flame out and auto relight
EGPWS receive landing gear position info
April 2007
Page 15
Review of ECAM STATUS – Electrical architecture A330/A340 family ECAM STATUS
.FOR
SLATS EXTENSION
– Since SFCC2 is recovered when engines are recovered, Slats/Flaps can be normally extended
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Wording
modification studied:
– .BEFORE SLATS EXTENSION
– .AT SLATS EXTENSION
– .JUST BEFORE SLATS EXTENSION Engine flame out and auto relight
April 2007
Page 16
Review of ECAM STATUS – Electrical architecture A330/A340 family ECAM STATUS
.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
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
.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
Engine flame out and auto relight
April 2007
Page 17
Review of ECAM STATUS – Electrical architecture A330/A340 family summary
Following all engine flameout, when at least one engine is recovered: AC
& DC LAND RCVRY BUS bars are still shed
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
“LAND “FOR
RECOVERY…….ON” still required
SLATS EXTENSION” current wording kept
Apply ECAM Engine flame out and auto relight
April 2007
Page 18
Review of ECAM STATUS – Electrical architecture A320 family • Basic configuration
DC 1
DC 2
DC ESS
AC ESS SHED
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
TR 1
DC ESS SHED
TR 2
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 19
Review of ECAM STATUS – Electrical architecture A320 family
• All engine Flame out • Emergency generator on RAT (no hydraulic EDP, windmilling insufficient) DC 1
DC 2
DC ESS
AC ESS SHED
TR 1
DC ESS SHED
TR 2
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ESS TR
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 20
Review of ECAM STATUS – Electrical architecture A320 family • Engines recovered • Emergency generator on hydraulic engine driven pumps DC 1
DC 2
DC ESS
AC ESS SHED
TR 1
DC ESS SHED
TR 2
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ESS TR
AC ESS
emergency generator AC 1
AC 2
GEN 1
GEN 2
IDG 2 IDG 1 Engine flame out and auto relight
April 2007
Page 21
Review of ECAM STATUS – Electrical architecture A320 family All engine lost Generators emergency generator
Bus bars available • AC & DC ESS • AC & DC ESS SHED
Engines recovered Generators © AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
GEN 1
Bus bars recovered
Bus bar still lost
GEN 2
IDG 2
• AC 1 & 2 • DC 1 & 2
NIL
IDG 1
Eng 1 & 2 emergency generator
Engine flame out and auto relight
• AC & DC ESS • AC & DC ESS SHED April 2007
Page 22
Review of ECAM STATUS – Electrical architecture A320 family summary
Following all engine flameout, when at least one engine is recovered: • No shed bus bar until landing (or landing gear extension) • Only the MIN RAT SPEED remains displayed
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
RAT
is still extended
Apply ECAM Engine flame out and auto relight
April 2007
Page 23
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 24
Review of ECAM STATUS – Hydraulic architecture A330/A340 family • Basic configuration
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
3000 psi
Engine flame out and auto relight
3000 psi
A330 e x am ple 3000 psi
April 2007
Page 25
Review of ECAM STATUS – Hydraulic architecture A330/A340 family • All engine flame out, RAT extension
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
2500 psi
Engine flame out and auto relight
0 psi
A330 e x am ple 0 psi
April 2007
Page 26
Review of ECAM STATUS – Hydraulic architecture A330/A340 family • Recovery of one engine, RAT still out
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
3000 psi
Engine flame out and auto relight
3000 psi
A330 e x am ple
0 psi
April 2007
Page 27
Review of ECAM STATUS – Hydraulic architecture A330/A340 family ECAM STATUS Engine 1 recovery (A330 example) • Green hydraulic Engine Driven Pump 1 (EDP 1) recovered EDP1
takes over the Green hydraulic pressurization
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
• Blue hydraulic recovered. • However the ECAM STATUS still shows the following:
Engine flame out and auto relight
April 2007
Page 28
Review of ECAM STATUS – Hydraulic architecture A330/A340 family ECAM STATUS
• Current ECAM logic aims at covering all cases recovered Engines not recovered
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Engines
• Extending the landing gear by gravity Minor
consequences (nose wheel steering loss)
Apply ECAM Engine flame out and auto relight
April 2007
Page 29
Review of ECAM STATUS – Hydraulic architecture A320 family • Basic configuration
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
3000 psi
Engine flame out and auto relight
3000 psi
3000 psi
April 2007
Page 30
Review of ECAM STATUS – Hydraulic architecture A320 family • All engine flame out, RAT extension
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
0 psi
Engine flame out and auto relight
2500 psi
0 psi
April 2007
Page 31
Review of ECAM STATUS – Hydraulic architecture A320 family • Recovery of one engine, RAT still out 3000 psi
3000 psi
3000 psi
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
OFF
Engine flame out and auto relight
April 2007
Page 32
Review of ECAM STATUS – Hydraulic architecture A320 family ECAM STATUS
Engine 1 recovery (example)
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ECAM
STATUS only displays the RAT limitation
Apply ECAM Engine flame out and auto relight
April 2007
Page 33
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 34
Review of ECAM STATUS – Operational documentation FCOM Enhancements The
ELEC EMER CONFIG procedure after engine/generator recovery
The
ENG ALL ENG FLAME OUT/ ENG DUAL FAILURE procedures after all engine recovery
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
Minor
FCOM volume 1 clarifications
QRH Enhancements The
ENG ALL ENG FLAME OUT/ ENG DUAL FAILURE procedures after all engine recovery
Engine flame out and auto relight
April 2007
Page 35
Review of ECAM STATUS – Operational documentation A 330
FCOM Enhancements
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ELEC
A 340
EMER CONFIG
Engine flame out and auto relight
April 2007
Page 36
Review of ECAM STATUS – Operational documentation A 330
FCOM Enhancements
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ELEC
A 340
EMER CONFIG (Cont’d)
Engine flame out and auto relight
April 2007
Page 37
Review of ECAM STATUS – Operational documentation FCOM Enhancements ENG
ALL ENG FLAME OUT/ ENG DUAL FAILURE A 320 A 330
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
A 340
Engine flame out and auto relight
April 2007
Page 38
Review of ECAM STATUS – Operational documentation A 330
FCOM Enhancements
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ENG
A 340
ALL ENG FLAME OUT
Engine flame out and auto relight
April 2007
Page 39
Review of ECAM STATUS – Operational documentation QRH Enhancements DUAL
A 320
FAILURE / ALL ENG FLAME OUT
A 330
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
A 340
Engine flame out and auto relight
April 2007
Page 40
Content Ò Review of engine auto relight function Ò Review of ECAM STATUS ÒElectrical architecture ÒHydraulic architecture
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
ÒOperational documentation Ò Conclusion
Engine flame out and auto relight
April 2007
Page 41
Conclusion
• Confident in auto relight function • Current ECAM procedure ensures safe aircraft operation
• FCOM/QRH have been enhanced to take into account
© AIRBUS S.A.S. All rights reserved. Confidential and proprietary document.
engine(s)/generator(s) recovery after the loss of all the engines/generators
Apply ECAM
Engine flame out and auto relight
April 2007
Page 42
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