DOC AIRBUS | TSM A320FTroubleshoot the Engine after an Oil Temperature High event
TASK 71-00-00-810-872-A
Troubleshoot the Engine after an Oil Temperature High event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-132-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-086-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:40:48 UTC
Troubleshoot the Engine after an Oil Temperature High event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 71-00-00-810-846-A | Troubleshoot the Engine after a High Oil Consumption event |
| TSM TASK 73-32-00-810-803-A | FMV TFUEL Sensor Electrical Failure Channel A |
| TSM TASK 73-32-00-810-804-A | FMV TFUEL Sensor Electrical Failure Channel B |
| TSM TASK 73-32-00-810-805-A | FMV TFUEL Sensor Signal Disagreement |
| TSM TASK 79-21-00-810-813-A | Engine Fuel/Oil Heat Exchanger (FOHE) Bypass Valve LVDT Electrical Failure (only Channel A) |
| TSM TASK 79-21-00-810-814-A | Engine Fuel/Oil Heat Exchanger (FOHE) Bypass Valve Position Error Track Check in Channel A |
| TSM TASK 79-32-00-810-830-A | Main Oil Temperature Sensor Electrical Failure Channel A |
| TSM TASK 79-32-21-810-801-A | Main Oil Temperature Sensor Electrical Failure Channel B |
| TSM TASK 79-32-21-810-802-A | Main Oil Temperature Sensor Signal Disagreement |
| AMM 71-00-00-780-802 | Test No. 13 - Main Oil Pressure Test and Adjustment |
| AMM 71-00-00-910-803 | Engine Operation Limits and Guidelines |
| AMM 72-00-00-210-811 | Inspection of the Engine after Engine Oil Overtemperature |
| AMM 73-21-00-710-806 | Test No.7 - EEC Operation Test (Self Test) |
| AMM 79-00-00-210-808 | Oil Consumption Monitoring |
| AMM 79-00-00-210-811 | Laboratory Analysis of the Engine Oil for Contamination |
| AMM 79-00-00-281-802 | Inspection of the Magnetic Chip Collectors for Oil Contamination |
| AMM 79-00-00-610-801 | Check and Fill the Engine Oil |
| AMM 79-00-00-680-801 | Drain the Engine Oil |
| AMM 79-21-08-000-801 | Removal of the Fuel/Oil Heat Exchanger |
| AMM 79-21-08-400-801 | Installation of the Fuel/Oil Heat Exchanger |
| AMM 79-21-11-000-802 | Removal of the Air/Oil Heat Exchanger |
| AMM 79-21-11-400-802 | Installation of the Air/Oil Heat Exchanger |
| AMM 79-35-00-200-801 |
Subtask 71-00-00-710-132-A ** ON A/C NOT FOR ALL
A. Investigate the Engine after an Oil Temperature High event
(1) Use this troubleshooting procedure to investigate the engine after an oil temperature high event.
(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 Electronic Engine Control (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, ground fault information, ground scanning information and the Aircraft Condition Monitoring System (ACMS) exceedance report. If there are any faults reported troubleshoot them first.
4. Fault Isolation(1) Use this troubleshooting procedure to investigate the engine after an oil temperature high event.
(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 Electronic Engine Control (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, ground fault information, ground scanning information and the Aircraft Condition Monitoring System (ACMS) exceedance report. 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 71-00-00-810-139-A ** ON A/C NOT FOR ALL A. Do the steps that follow:
(1) If the crew alert warning messages related to the engine high vibration and N1 or N2 vibration amber vibration level is reported, remove the engine from service.
(2) Use reported or recorded data to determine the oil temperature attained and the time duration at the attained temperature.
(a) Compare the data with the engine operation limits AMM 71-00-00-910-803.
(b) If the oil temperature exceeded the limits inspect the oil system AMM 72-00-00-210-811.
(3) If the maintenance messages related to the oil temperature sensor electrical failure on channel A appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel heat system and amber crosses on TOIL display, refer to main oil temperature sensor electrical failure (Ref. TSM TASK 79-32-00-810-830).
(4) If the maintenance messages related to the oil temperature sensor electrical failure on channel B appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel heat system and amber crosses on TOIL display, refer to main oil temperature sensor electrical failure (Ref. TSM TASK 79-32-21-810-801).
(5) If the maintenance messages related to the oil temperature sensor signal disagree appear with the ECAM warning for FADEC status maintenance, refer to main oil temperature sensor signal disagreement (Ref. TSM TASK 79-32-21-810-802).
(6) If the maintenance messages related to the engine Fuel/Oil Heat Exchanger (FOHE) bypass valve Linear Variable Differential Transducer (LVDT) electrical failure on channel A appear, refer to engine FOHE bypass valve LVDT electrical failure (Ref. TSM TASK 79-21-00-810-813).
(7) If the maintenance messages related to the engine FOHE bypass valve mechanical failure appear with the ECAM warning for engine heat system fault, refer to engine FOHE bypass valve position error track check in channel A (Ref. TSM TASK 79-21-00-810-814).
(8) If the maintenance messages related to the fuel temperature sensor signal disagree appear with the ECAM warning for engine heat system degraded, refer to FMV TFUEL sensor signal disagreement (Ref. TSM TASK 73-32-00-810-805).
(9) If the maintenance messages related to the fuel temperature sensor electrical failure on channel A appear with the ECAM warning for engine heat system fault, refer to FMV TFUEL sensor electrical failure (Ref. TSM TASK 73-32-00-810-803).
(10) If the maintenance messages related to the fuel temperature sensor electrical failure on channel B appear with the ECAM warning for engine heat system fault, refer to FMV TFUEL sensor electrical failure (Ref. TSM TASK 73-32-00-810-804).
(11) If there are no EEC monitored faults reported, check the oil level AMM 79-00-00-610-801.
(a) If you must service the oil tank, check the oil consumption rate AMM 79-00-00-210-808.
(b) If the oil consumption is excessive, check the engine. Refer to high oil consumption (Ref. TSM TASK 71-00-00-810-846).
(c) Inspect the oil system to see if it has been overserviced.
1 Look at the oil tank sight glass within the specified time limits after engine shutdown. If the sight glass indication is above the inspection limits and/or there is evidence of oil streaking on the nacelle or oil leaking from the drain mast the engine may be overserviced.
2 If the engine oil system has been overserviced, properly service the engine oil system AMM 79-00-00-680-801 and AMM 79-00-00-610-801.
(d) Inspect for a fuel smell in the engine oil. If fuel smell is present in the engine oil, do a laboratory analysis of the engine oil for contamination AMM 79-00-00-210-811.
1 Replace the Fuel/Oil Heat Exchanger (FOHE), go to the Para. 4.A.(14).
(12) Do a check of the front bearing compartment chip collector AMM 79-35-00-200-801.
(13) Do a check of the remaining chip collectors AMM 79-00-00-281-802.
(14) If no problems are found, replace the FOHE AMM 79-21-08-000-801 and AMM 79-21-08-400-801.
(15) If the problem comes back, replace the air/oil heat exchanger AMM 79-21-11-000-802 and AMM 79-21-11-400-802.
(16) Test the main oil pressure AMM 71-00-00-780-802.
(a) Adjust the main oil pressure as necessary.
(17) If the problem comes back, remove the engine from service.
5. Close-up(1) If the crew alert warning messages related to the engine high vibration and N1 or N2 vibration amber vibration level is reported, remove the engine from service.
(2) Use reported or recorded data to determine the oil temperature attained and the time duration at the attained temperature.
(a) Compare the data with the engine operation limits AMM 71-00-00-910-803.
(b) If the oil temperature exceeded the limits inspect the oil system AMM 72-00-00-210-811.
(3) If the maintenance messages related to the oil temperature sensor electrical failure on channel A appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel heat system and amber crosses on TOIL display, refer to main oil temperature sensor electrical failure (Ref. TSM TASK 79-32-00-810-830).
(4) If the maintenance messages related to the oil temperature sensor electrical failure on channel B appear with the ECAM warning for engine FADEC status maintenance and/or the ECAM warning for engine fuel heat system and amber crosses on TOIL display, refer to main oil temperature sensor electrical failure (Ref. TSM TASK 79-32-21-810-801).
(5) If the maintenance messages related to the oil temperature sensor signal disagree appear with the ECAM warning for FADEC status maintenance, refer to main oil temperature sensor signal disagreement (Ref. TSM TASK 79-32-21-810-802).
(6) If the maintenance messages related to the engine Fuel/Oil Heat Exchanger (FOHE) bypass valve Linear Variable Differential Transducer (LVDT) electrical failure on channel A appear, refer to engine FOHE bypass valve LVDT electrical failure (Ref. TSM TASK 79-21-00-810-813).
(7) If the maintenance messages related to the engine FOHE bypass valve mechanical failure appear with the ECAM warning for engine heat system fault, refer to engine FOHE bypass valve position error track check in channel A (Ref. TSM TASK 79-21-00-810-814).
(8) If the maintenance messages related to the fuel temperature sensor signal disagree appear with the ECAM warning for engine heat system degraded, refer to FMV TFUEL sensor signal disagreement (Ref. TSM TASK 73-32-00-810-805).
(9) If the maintenance messages related to the fuel temperature sensor electrical failure on channel A appear with the ECAM warning for engine heat system fault, refer to FMV TFUEL sensor electrical failure (Ref. TSM TASK 73-32-00-810-803).
(10) If the maintenance messages related to the fuel temperature sensor electrical failure on channel B appear with the ECAM warning for engine heat system fault, refer to FMV TFUEL sensor electrical failure (Ref. TSM TASK 73-32-00-810-804).
(11) If there are no EEC monitored faults reported, check the oil level AMM 79-00-00-610-801.
(a) If you must service the oil tank, check the oil consumption rate AMM 79-00-00-210-808.
(b) If the oil consumption is excessive, check the engine. Refer to high oil consumption (Ref. TSM TASK 71-00-00-810-846).
(c) Inspect the oil system to see if it has been overserviced.
1 Look at the oil tank sight glass within the specified time limits after engine shutdown. If the sight glass indication is above the inspection limits and/or there is evidence of oil streaking on the nacelle or oil leaking from the drain mast the engine may be overserviced.
2 If the engine oil system has been overserviced, properly service the engine oil system AMM 79-00-00-680-801 and AMM 79-00-00-610-801.
(d) Inspect for a fuel smell in the engine oil. If fuel smell is present in the engine oil, do a laboratory analysis of the engine oil for contamination AMM 79-00-00-210-811.
1 Replace the Fuel/Oil Heat Exchanger (FOHE), go to the Para. 4.A.(14).
(12) Do a check of the front bearing compartment chip collector AMM 79-35-00-200-801.
(13) Do a check of the remaining chip collectors AMM 79-00-00-281-802.
(14) If no problems are found, replace the FOHE AMM 79-21-08-000-801 and AMM 79-21-08-400-801.
(15) If the problem comes back, replace the air/oil heat exchanger AMM 79-21-11-000-802 and AMM 79-21-11-400-802.
(16) Test the main oil pressure AMM 71-00-00-780-802.
(a) Adjust the main oil pressure as necessary.
(17) If the problem comes back, remove the engine from service.
Subtask 71-00-00-860-086-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.