DOC AIRBUS | TSM A320FTroubleshoot the Engine after a Slow Engine Response event
TASK 71-00-00-810-875-A
Troubleshoot the Engine after a Slow Engine Response event
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-135-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-089-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:06 UTC
Troubleshoot the Engine after a Slow Engine Response event
1. Possible Causes
- INTEGRATED FUEL PUMP AND CONTROL [4360KS]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 71-00-00-810-854-A | Troubleshoot the Engine after a Surge - Forward Thrust event |
| TSM TASK 73-11-00-810-808-A | Integrated Fuel Pump and Control/FMV-Track Check Channel A |
| TSM TASK 73-11-00-810-813-A | Integrated Fuel Pump and Control/FMV-Track Check Channel B |
| TSM TASK 73-21-00-810-894-A | P2 Synthesized in Disagreement with ADIRUx |
| TSM TASK 73-21-00-810-897-A | T2 in Disagreement with ADIRUx or T2 in Range Failed |
| TSM TASK 73-21-00-810-903-A | PAMB Sensor Signal Failure for Engine (only on Channel A) |
| TSM TASK 76-11-00-810-825-A | TRA Signal Failure Channel A |
| TSM TASK 76-11-00-810-826-A | TRA Signal Failure Channel B |
| TSM TASK 77-11-00-810-808-A | N1 Sensor Electrical Failure Channel B |
| TSM TASK 77-11-00-810-809-A | N1 Sensor Electrical Failure Channel A |
| TSM TASK 77-11-00-810-811-A | N2 Sensor Electrical Failure on Channel A |
| TSM TASK 77-11-00-810-812-A | N2 Sensor Electrical Failure on Channel B |
| AMM 36-11-00-740-802 | BITE Test of the Engine Bleed Air System (EBAS) (System Test) |
| AMM 71-00-00-710-805 | Test No. 4 - Power Acceleration/Deceleration Test |
| AMM 72-41-00-290-802 | Borescope Inspection of the Combustion Chamber and HPT Nozzle Guide Vanes |
| AMM 73-11-00-210-805 | General Visual Inspection of the Fuel Distribution System for Contamination |
| AMM 73-11-01-000-801 | Removal of the Integrated Fuel Pump and Control (IFPC) |
| AMM 73-11-01-400-801 | Installation of the Integrated Fuel Pump and Control (IFPC) |
| AMM 73-21-00-200-806 | Electronic Engine Control (EEC) Sensing System Check |
| AMM 73-21-00-710-806 | Test No.7 - EEC Operation Test (Self Test) |
| AMM 75-32-01-400-801 | Installation of the Low Pressure Compressor (LPC) (2.5) Bleed Valve Actuator |
Subtask 71-00-00-710-135-A ** ON A/C NOT FOR ALL
A. Investigate the Engine after a Slow Engine Response event
(1) Using the Multipurpose Control and Display Unit (MCDU) test the FADEC system for any recorded faults AMM 73-21-00-710-806.
(2) Any EEC monitored faults are transmitted to the aircraft Centralized Fault Display Interface Unit (CFDIU). The MCDU allows interactive dialog with the EEC. Use the MCDU to review the previous flight leg fault information, scheduled maintenance fault information and ground fault information. If there are any faults reported troubleshoot them first.
4. Fault Isolation(1) Using the Multipurpose Control and Display Unit (MCDU) test the FADEC system for any recorded faults AMM 73-21-00-710-806.
(2) Any EEC monitored faults are transmitted to the aircraft Centralized Fault Display Interface Unit (CFDIU). The MCDU allows interactive dialog with the EEC. Use the MCDU to review the previous flight leg fault information, scheduled maintenance fault information and ground fault information. If there are any faults reported troubleshoot them first.
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
Subtask 71-00-00-810-142-A ** ON A/C NOT FOR ALL A. Do the steps that follow:
(1) If the maintenance messages related to the Throttle Resolver Angle (TRA) signal failure on channel A appear with the ECAM warning for engine one Thrust Lever Angle (TLA) fault and/or engine thrust lever fault and engine thrust and reserver, refer to TRA Signal Failure (Ref. TSM TASK 76-11-00-810-825).
(2) If the maintenance messages related to the TRA signal failure on channel B appear with the ECAM warning for engine one TLA fault and/or engine thrust lever fault and engine thrust and reserver, refer to TRA Signal Failure (Ref. TSM TASK 76-11-00-810-826).
(3) If the ECAM warning for engine stall appear, refer to troubleshoot the engine after a surge - forward thrust event (Ref. TSM TASK 71-00-00-810-854).
(4) If the maintenance messages related to the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) primary failure appear with the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA master actuator / mechanical failure resulting in inability to position actuator (Ref. TSM TASK 75-31-00-810-819).
(5) If the maintenance messages related to the Fuel Metering Valve (FMV) track check on channel A appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault and engine fuel valve fault, refer to integrated fuel pump and control/FMV-track check channel A (Ref. TSM TASK 73-11-00-810-808).
(6) If the maintenance messages related to the FMV track check on channel B appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault and engine fuel valve fault, refer to integrated fuel pump and control/FMV-track check channel B (Ref. TSM TASK 73-11-00-810-813).
(7) If the maintenance messages related to the Pamb sensor failure on channel A appear with ECAM warning for engine minor fault, refer to pamb sensor signal failure for engine (Ref. TSM TASK 73-21-00-810-903).
(8) If the maintenance messages related to the T2 sensor disagree with ADIRU sensor appear, refer to T2 in disagreement with ADIRUx or T2 in range failed (Ref. TSM TASK 73-21-00-810-897).
(9) If the maintenance messages related to the Pamb sensor disagree with ADIRU sensor appear, refer to pamb in range failed (Ref. TSM TASK 73-21-00-810-902).
(10) If the maintenance messages related to the P2 calculated disagree with ADIRU sensor appear, refer to P2 synthesized in disagreement with ADIRUx (Ref. TSM TASK 73-21-00-810-894).
(11) If the maintenance messages related to the N2 speed sensor failure on channel A appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N2, refer to N2 sensor electrical failure (Ref. TSM TASK 77-11-00-810-811).
(12) If the maintenance messages related to the N2 speed sensor failure on channel B appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N2, refer to N2 sensor electrical failure (Ref. TSM TASK 77-11-00-810-812).
(13) If the maintenance messages related to the N1 speed sensor failure on channel A appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N1, refer to N1 sensor electrical failure (Ref. TSM TASK 77-11-00-810-809)
(14) If the maintenance messages related to the N1 speed sensor failure on channel B appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N1, refer to N1 sensor electrical failure (Ref. TSM TASK 77-11-00-810-808)
(15) If there are no EEC monitored faults or messages recorded, check the burner pressure sensing lines AMM 73-21-00-200-806.
(16) If you do not find any problems, check to make sure that the Low Pressure Compressor (LPC) (2.5) bleed linkage is secure AMM 75-32-01-400-801.
(17) If you do not find any problems, borescope inspect the combustion chamber area. Look carefully at the fuel nozzles for clogging AMM 72-41-00-290-802.
(18) If you do not find any problems, check the fuel nozzles for clogging/coking AMM 73-11-00-210-805.
(19) If you do not find any problems:
(a) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(20) If you do not find any problems, it may indicate an aircraft system interface problem such as the Environmental Control System (ECS). Check the aircraft ECS for any recorded faults AMM 36-11-00-740-802.
(21) Do a power acceleration/deceleration test AMM 71-00-00-710-805.
5. Close-up(1) If the maintenance messages related to the Throttle Resolver Angle (TRA) signal failure on channel A appear with the ECAM warning for engine one Thrust Lever Angle (TLA) fault and/or engine thrust lever fault and engine thrust and reserver, refer to TRA Signal Failure (Ref. TSM TASK 76-11-00-810-825).
(2) If the maintenance messages related to the TRA signal failure on channel B appear with the ECAM warning for engine one TLA fault and/or engine thrust lever fault and engine thrust and reserver, refer to TRA Signal Failure (Ref. TSM TASK 76-11-00-810-826).
(3) If the ECAM warning for engine stall appear, refer to troubleshoot the engine after a surge - forward thrust event (Ref. TSM TASK 71-00-00-810-854).
(4) If the maintenance messages related to the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) primary failure appear with the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA master actuator / mechanical failure resulting in inability to position actuator (Ref. TSM TASK 75-31-00-810-819).
(5) If the maintenance messages related to the Fuel Metering Valve (FMV) track check on channel A appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault and engine fuel valve fault, refer to integrated fuel pump and control/FMV-track check channel A (Ref. TSM TASK 73-11-00-810-808).
(6) If the maintenance messages related to the FMV track check on channel B appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault and engine fuel valve fault, refer to integrated fuel pump and control/FMV-track check channel B (Ref. TSM TASK 73-11-00-810-813).
(7) If the maintenance messages related to the Pamb sensor failure on channel A appear with ECAM warning for engine minor fault, refer to pamb sensor signal failure for engine (Ref. TSM TASK 73-21-00-810-903).
(8) If the maintenance messages related to the T2 sensor disagree with ADIRU sensor appear, refer to T2 in disagreement with ADIRUx or T2 in range failed (Ref. TSM TASK 73-21-00-810-897).
(9) If the maintenance messages related to the Pamb sensor disagree with ADIRU sensor appear, refer to pamb in range failed (Ref. TSM TASK 73-21-00-810-902).
(10) If the maintenance messages related to the P2 calculated disagree with ADIRU sensor appear, refer to P2 synthesized in disagreement with ADIRUx (Ref. TSM TASK 73-21-00-810-894).
(11) If the maintenance messages related to the N2 speed sensor failure on channel A appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N2, refer to N2 sensor electrical failure (Ref. TSM TASK 77-11-00-810-811).
(12) If the maintenance messages related to the N2 speed sensor failure on channel B appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N2, refer to N2 sensor electrical failure (Ref. TSM TASK 77-11-00-810-812).
(13) If the maintenance messages related to the N1 speed sensor failure on channel A appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N1, refer to N1 sensor electrical failure (Ref. TSM TASK 77-11-00-810-809)
(14) If the maintenance messages related to the N1 speed sensor failure on channel B appear with the ECAM warning for engine FADEC system fault and/or the ECAM warning for engine sensor fault and amber crosses on N1, refer to N1 sensor electrical failure (Ref. TSM TASK 77-11-00-810-808)
(15) If there are no EEC monitored faults or messages recorded, check the burner pressure sensing lines AMM 73-21-00-200-806.
(16) If you do not find any problems, check to make sure that the Low Pressure Compressor (LPC) (2.5) bleed linkage is secure AMM 75-32-01-400-801.
(17) If you do not find any problems, borescope inspect the combustion chamber area. Look carefully at the fuel nozzles for clogging AMM 72-41-00-290-802.
(18) If you do not find any problems, check the fuel nozzles for clogging/coking AMM 73-11-00-210-805.
(19) If you do not find any problems:
(a) Replace INTEGRATED FUEL PUMP AND CONTROL [4360KS] AMM 73-11-01-000-801 and AMM 73-11-01-400-801.
(20) If you do not find any problems, it may indicate an aircraft system interface problem such as the Environmental Control System (ECS). Check the aircraft ECS for any recorded faults AMM 36-11-00-740-802.
(21) Do a power acceleration/deceleration test AMM 71-00-00-710-805.
Subtask 71-00-00-860-089-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(1) Make sure that the work area is clean and clear of tools and other items.