DOC AIRBUS | TSM A320FTroubleshoot the Engine after an Auto Deceleration event
TASK 71-00-00-810-883-A
Troubleshoot the Engine after an Auto Deceleration event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-143-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-097-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:07 UTC
Troubleshoot the Engine after an Auto Deceleration event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 72-00-00-810-815-A | Shaft Shear Event Detected |
| TSM TASK 73-11-00-810-841-A | TCM Cutback Accommodation Activated in Flare only |
| TSM TASK 73-11-00-810-842-A | TCM Cutback Accommodation Activated |
| TSM TASK 73-11-00-810-845-A | Fuel Flow not at Shutoff During Start - Failure on Both Channels |
| TSM TASK 73-21-00-810-912-A | Aircraft 28 VDC Bus Fail Channel A |
| TSM TASK 73-21-00-810-913-A | Aircraft 28 VDC Bus Fail Channel B |
| TSM TASK 75-31-00-810-813-A | HPC SVA Master/Slave Actuator Position Error - Track Check Channel A |
| TSM TASK 75-31-00-810-822-A | HPC SVA Master/Slave Actuator Position Error - Track Check Channel B |
| TSM TASK 76-11-00-810-824-A | Autothrust Instinctive Disconnect Hardwired Discrete Signal Failure 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 76-11-00-810-827-A | Autothrust Instinctive Disconnect Hardwired Discrete Signal Failure Channel B |
| AMM 22-96-00-710-001 | Operational Test of the AFS |
| 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 73-21-00-710-807 | Test No.6 - EEC Operation Test (Idle Test) |
| AMM 77-11-23-000-801 | Remove the N2 Speed Transducer |
| AMM 77-11-23-400-801 | Install the N2 Speed Transducer |
Subtask 71-00-00-710-143-A ** ON A/C NOT FOR ALL
A. Investigate the Engine after an Auto Deceleration event
(1) Use this troubleshooting procedure to investigate the engine after a decrease in engine parameters (N1, N2, EGT, and fuel flow) without thrust lever movement.
(2) Using the Multipurpose Control and Display Unit (MCDU) test the FADEC system for any recorded faults AMM 73-21-00-710-806.
(3) 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) Use this troubleshooting procedure to investigate the engine after a decrease in engine parameters (N1, N2, EGT, and fuel flow) without thrust lever movement.
(2) Using the Multipurpose Control and Display Unit (MCDU) test the FADEC system for any recorded faults AMM 73-21-00-710-806.
(3) 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 71-00-00-810-150-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 Throttle Lever Angle (TLA) fault and/or engine throttle lever fault, 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 throttle lever fault, refer to TRA signal failure (Ref. TSM TASK 76-11-00-810-826).
(3) If the maintenance message related to the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) primary failure on chanel A appear with the ECAM warning for engine FADEC status maintenance or the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA mechanical failure (Ref. TSM TASK 75-31-00-810-813)
(4) If the maintenance message related to the HPC SVA primary failure on channel B appear with the ECAM warning for engine FADEC status maintenance or the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA mechanical failure (Ref. TSM TASK 75-31-00-810-822)
(5) If the maintenance messages related to the mechanical failure on Fuel Metering Valve (FMV) command position appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault / engine fuel valve fault, refer to Integrated Fuel Pump and Control (IFPC) / mechanical failure - unable to control metering valve position (Ref. TSM TASK 73-11-00-810-845).
(6) If the maintenance messages related to the FMV not closed on channel A appear with the ECAM warning for engine fuel valve fault, refer to fuel flow not at shutoff during start channel A (Ref. TSM TASK 73-11-00-810-845).
(7) If the maintenance messages related to the FMV not closed on channel B appear with the ECAM warning for engine fuel valve fault, refer to fuel flow not at shutoff during start channel B (Ref. TSM TASK 73-11-00-810-845).
(8) If the maintenance messages related to the Thrust Control Malfunction (TCM) accomodation activated appear with the ECAM warning for engine fail, refer to TCM shutdown accommodation activated (Ref. TSM TASK 73-11-00-810-842).
(9) If the maintenance messages related to the TCM cutback activated in flare appear with the ECAM warning for engine control system fault, refer to TCM cutback accommodation activated in flare only (Ref. TSM TASK 73-11-00-810-841).
(10) If the maintenance messages related to 28 VDC failure on channel A appear with the ECAM warning for engine FADEC statut maintenance or the ECAM warning for engine A/C FADEC supply and/or engine start, refer to aircraft 28 VDC Bus failed (Ref. TSM TASK 73-21-00-810-912).
(11) If the maintenance messages related to 28 VDC failure on channel B appear with the ECAM warning for engine FADEC statut maintenance or the ECAM warning for engine A/C FADEC supply and/or engine start, refer to aircraft 28 VDC Bus failed (Ref. TSM TASK 73-21-00-810-913).
(12) If the maintenance messages related to the autothrust instinctive disconnect on channel A appear with the ECAM warning for engine FADEC status maintenance, refer to autothrust instinctive disconnect hardwired discrete signal failure channel A (Ref. TSM TASK 76-11-00-810-824).
(13) If the maintenance messages related to the autothrust instinctive disconnect on channel B appear with the ECAM warning for engine FADEC status maintenance, refer to autothrust instinctive disconnect hardwired discrete signal failure channel B (Ref. TSM TASK 76-11-00-810-827).
(14) If the maintenance messages related to the shaft shear appear with the ECAM warning for engine fail shaft failure, refer to shaft shear detected (HPT LPT shaft) (Ref. TSM TASK 72-00-00-810-815).
(15) If there are no EEC monitored faults recorded, check the burner pressure sensing lines AMM 73-21-00-200-806.
(16) If you do not find any problems:
(a) Check for fuel system contamination AMM 73-11-00-210-805.
(17) 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.
(b) Do the test given in Para. 3.
(18) If the problem continues:
(a) Replace TRANSDUCER-N2 [4065KS] AMM 77-11-23-000-801 and AMM 77-11-23-400-801.
(b) Do the test given in Para. 3.
(19) If the problem continues:
(a) Check the aircraft Automatic Flight System (AFS) for any recorded faults AMM 22-96-00-710-001.
(20) If not previously accomplished run the engine at idle AMM 73-21-00-710-807.
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 Throttle Lever Angle (TLA) fault and/or engine throttle lever fault, 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 throttle lever fault, refer to TRA signal failure (Ref. TSM TASK 76-11-00-810-826).
(3) If the maintenance message related to the High Pressure Compressor (HPC) Stator Vane Actuator (SVA) primary failure on chanel A appear with the ECAM warning for engine FADEC status maintenance or the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA mechanical failure (Ref. TSM TASK 75-31-00-810-813)
(4) If the maintenance message related to the HPC SVA primary failure on channel B appear with the ECAM warning for engine FADEC status maintenance or the ECAM warning for engine compressor vane thrust limited, refer to HPC SVA mechanical failure (Ref. TSM TASK 75-31-00-810-822)
(5) If the maintenance messages related to the mechanical failure on Fuel Metering Valve (FMV) command position appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel control fault / engine fuel valve fault, refer to Integrated Fuel Pump and Control (IFPC) / mechanical failure - unable to control metering valve position (Ref. TSM TASK 73-11-00-810-845).
(6) If the maintenance messages related to the FMV not closed on channel A appear with the ECAM warning for engine fuel valve fault, refer to fuel flow not at shutoff during start channel A (Ref. TSM TASK 73-11-00-810-845).
(7) If the maintenance messages related to the FMV not closed on channel B appear with the ECAM warning for engine fuel valve fault, refer to fuel flow not at shutoff during start channel B (Ref. TSM TASK 73-11-00-810-845).
(8) If the maintenance messages related to the Thrust Control Malfunction (TCM) accomodation activated appear with the ECAM warning for engine fail, refer to TCM shutdown accommodation activated (Ref. TSM TASK 73-11-00-810-842).
(9) If the maintenance messages related to the TCM cutback activated in flare appear with the ECAM warning for engine control system fault, refer to TCM cutback accommodation activated in flare only (Ref. TSM TASK 73-11-00-810-841).
(10) If the maintenance messages related to 28 VDC failure on channel A appear with the ECAM warning for engine FADEC statut maintenance or the ECAM warning for engine A/C FADEC supply and/or engine start, refer to aircraft 28 VDC Bus failed (Ref. TSM TASK 73-21-00-810-912).
(11) If the maintenance messages related to 28 VDC failure on channel B appear with the ECAM warning for engine FADEC statut maintenance or the ECAM warning for engine A/C FADEC supply and/or engine start, refer to aircraft 28 VDC Bus failed (Ref. TSM TASK 73-21-00-810-913).
(12) If the maintenance messages related to the autothrust instinctive disconnect on channel A appear with the ECAM warning for engine FADEC status maintenance, refer to autothrust instinctive disconnect hardwired discrete signal failure channel A (Ref. TSM TASK 76-11-00-810-824).
(13) If the maintenance messages related to the autothrust instinctive disconnect on channel B appear with the ECAM warning for engine FADEC status maintenance, refer to autothrust instinctive disconnect hardwired discrete signal failure channel B (Ref. TSM TASK 76-11-00-810-827).
(14) If the maintenance messages related to the shaft shear appear with the ECAM warning for engine fail shaft failure, refer to shaft shear detected (HPT LPT shaft) (Ref. TSM TASK 72-00-00-810-815).
(15) If there are no EEC monitored faults recorded, check the burner pressure sensing lines AMM 73-21-00-200-806.
(16) If you do not find any problems:
(a) Check for fuel system contamination AMM 73-11-00-210-805.
(17) 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.
(b) Do the test given in Para. 3.
(18) If the problem continues:
(a) Replace TRANSDUCER-N2 [4065KS] AMM 77-11-23-000-801 and AMM 77-11-23-400-801.
(b) Do the test given in Para. 3.
(19) If the problem continues:
(a) Check the aircraft Automatic Flight System (AFS) for any recorded faults AMM 22-96-00-710-001.
(20) If not previously accomplished run the engine at idle AMM 73-21-00-710-807.
Subtask 71-00-00-860-097-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.