DOC AIRBUS | TSM A320FTroubleshoot the Engine after a Smoke and/or Oil Fumes in the Cabin event
TASK 71-00-00-810-847-A
Troubleshoot the Engine after a Smoke and/or Oil Fumes in the Cabin event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-104-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-059-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:04 UTC
Troubleshoot the Engine after a Smoke and/or Oil Fumes in the Cabin event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 21-00-00-615-001 | Decontamination of the Environmental Control System (ECS) when the Temperature is below 24 deg.C (APU) |
| AMM 21-00-00-615-002 | Decontamination of the Environmental Control System (ECS) when the Temperature is above 24 deg.C (APU) |
| AMM 21-00-00-615-003 | Decontamination of the Environmental Control System (ECS) when the Temperature is below 24 deg.C (Engine/s) |
| AMM 21-00-00-615-004 | Decontamination of the Environmental Control System (ECS) when the Temperature is above 24 deg.C (Engine/s) |
| AMM 71-00-00-720-811 | Test No. 3 - Idle Power Test |
| AMM 71-00-00-860-814 | Shutdown of the Engine |
| AMM 72-31-00-290-802 | Borescope Inspection of the Low Pressure Compressor (LPC) Assembly |
| AMM 72-35-00-290-801 | Borescope Inspection of the High Pressure Compressor (HPC) Assembly |
| AMM 73-21-00-710-806 | Test No.7 - EEC Operation Test (Self Test) |
Fan Exit Liner Segment Vent (5 locations)Subtask 71-00-00-710-104-A ** ON A/C NOT FOR ALL
A. Use this troubleshooting procedure to investigate the engine after a smoke and/or oil fumes in the cabin event.
(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 IsolationNOTE: In most cases fumes in the cabin are caused by contamination of the aircraft pneumatic system. The pneumatic system (ATA 36) supplies air to the air conditioning system (ATA 21) and can be contaminated by the Auxiliary Power Unit (APU) or the engine. Make sure that you rule out other sources of smoke or fumes before troubleshooting the engine. Check the various aircraft related areas such as the APU recirculation fans cargo compartments air conditioning ducts and cooling packs.
(1) Using the Multipurpose Control and Display Unit (MCDU) test the FADEC system for any recorded faults. Refer to do the EEC system interactive test 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.
WARNING:
REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
Subtask 71-00-00-810-112-A ** ON A/C NOT FOR ALL A. Do the steps that follow:
(1) If the crew alert warning message related to the high vibration and N1 vibration or N2 vibration (amber vibration level) is reported, remove the engine from service.
(2) Look to see if one or more of the fault messages are set were set on either engine within the past 10 flights: ENGXD-0235-BUFFER AIR SHUTOFF VLV FAIL CLSD, ENGXD-0237-BUFFER AIR SHUTOFF VLV FAIL OPEN, ENGXD-0239-BUFFER AIR CHECK VLV FAIL OPEN, and ENGXD-0241-BUFFER AIR CHECK VLV FAIL CLSD
(a) If one or more of the messages were set, go to Step 4.A.(4).
(3) If there are no messages determine if the oil fumes are detected in the cabin, do the steps as follows:
1 Make sure that the air conditioning system is on.
2 Make sure that the APU is off.
3 If fumes are detected, shut down the engine AMM 71-00-00-860-814 and go to the Para. 4.A.(3).
(b) If no fumes are detected, shut down the engine AMM 71-00-00-860-814 and start the other engine using a ground cart. Refer to do the idle power test (cowls closed) AMM 71-00-00-720-811.
1 Make sure that the air conditioning system is on.
2 Make sure that the APU is off.
3 If fumes are detected, shut down the engine AMM 71-00-00-860-814 and go to the Para. 4.A.(3).
4 If no fumes are detected, shut down the engine AMM 71-00-00-860-814.
(4) If the problem continues and it is suspected that the fumes originate from an engine, use a flashlight to inspect the aft portion of the fan blade platforms and the inlet of the Fan Intermediate Case (forward of the Fan Exit Stators) for oil wetting.
(a) If there is evidence of oil wetting, remove the engine from service.
(5) If the problem continues and it is suspected that the fumes originate from an engine check the suspect engine for oil leaks at the engine bleeds, see the figures below.
(a) Check the area around the LPC 2.5 bleed air exit and the HPC bleed valves.
(b) If there is evidence of oil contamination, remove the engine from service.
(6) If you do not find any problems, inspect the High Pressure Compressor (HPC). Refer to do a borescope inspection of the HPC AMM 72-35-00-290-801.
(a) If there is evidence of oil contamination, remove the engine from service.
(b) If there is no evidence of oil in the engine inspect the bleed air ducts. Clean the Environmental Control System (ECS) AMM 21-00-00-615-003 or AMM 21-00-00-615-004 and send the engine back to service.
(c) If the Bleed Air Ducts are contaminated, and the engine gaspath is clean, the source of the oil fumes is not the engine. Further investigation is required.
(7) If you do not find any problems, inspect the LPC AMM 72-31-00-290-802.
(a) If there is evidence of oil contamination remove the engine from service.
5. Close-up(1) If the crew alert warning message related to the high vibration and N1 vibration or N2 vibration (amber vibration level) is reported, remove the engine from service.
(2) Look to see if one or more of the fault messages are set were set on either engine within the past 10 flights: ENGXD-0235-BUFFER AIR SHUTOFF VLV FAIL CLSD, ENGXD-0237-BUFFER AIR SHUTOFF VLV FAIL OPEN, ENGXD-0239-BUFFER AIR CHECK VLV FAIL OPEN, and ENGXD-0241-BUFFER AIR CHECK VLV FAIL CLSD
(a) If one or more of the messages were set, go to Step 4.A.(4).
(3) If there are no messages determine if the oil fumes are detected in the cabin, do the steps as follows:
NOTE: If the LH and RH packs are contaminated, the engine position cannot be identified easily by doing an engine run. It can be better to do the decontamination of the Environmental Control System (ECS) before an engine run AMM 21-00-00-615-001 or AMM 21-00-00-615-002.
(a) Start one engine using a ground cart. Refer to do the idle power test (cowls closed) AMM 71-00-00-720-811. 1 Make sure that the air conditioning system is on.
2 Make sure that the APU is off.
3 If fumes are detected, shut down the engine AMM 71-00-00-860-814 and go to the Para. 4.A.(3).
(b) If no fumes are detected, shut down the engine AMM 71-00-00-860-814 and start the other engine using a ground cart. Refer to do the idle power test (cowls closed) AMM 71-00-00-720-811.
1 Make sure that the air conditioning system is on.
2 Make sure that the APU is off.
3 If fumes are detected, shut down the engine AMM 71-00-00-860-814 and go to the Para. 4.A.(3).
4 If no fumes are detected, shut down the engine AMM 71-00-00-860-814.
(4) If the problem continues and it is suspected that the fumes originate from an engine, use a flashlight to inspect the aft portion of the fan blade platforms and the inlet of the Fan Intermediate Case (forward of the Fan Exit Stators) for oil wetting.
(a) If there is evidence of oil wetting, remove the engine from service.
(5) If the problem continues and it is suspected that the fumes originate from an engine check the suspect engine for oil leaks at the engine bleeds, see the figures below.
(a) Check the area around the LPC 2.5 bleed air exit and the HPC bleed valves.
(b) If there is evidence of oil contamination, remove the engine from service.
(6) If you do not find any problems, inspect the High Pressure Compressor (HPC). Refer to do a borescope inspection of the HPC AMM 72-35-00-290-801.
(a) If there is evidence of oil contamination, remove the engine from service.
(b) If there is no evidence of oil in the engine inspect the bleed air ducts. Clean the Environmental Control System (ECS) AMM 21-00-00-615-003 or AMM 21-00-00-615-004 and send the engine back to service.
(c) If the Bleed Air Ducts are contaminated, and the engine gaspath is clean, the source of the oil fumes is not the engine. Further investigation is required.
(7) If you do not find any problems, inspect the LPC AMM 72-31-00-290-802.
(a) If there is evidence of oil contamination remove the engine from service.
Subtask 71-00-00-860-059-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.