DOC AIRBUS | TSM A320FTroubleshoot the Engine after a no Oil Pressure event
TASK 71-00-00-810-881-A
Troubleshoot the Engine after a no Oil Pressure event
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 71-00-00-710-141-A ** ON A/C NOT FOR ALL
Subtask 71-00-00-860-095-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:35:07 UTC
Troubleshoot the Engine after a no Oil Pressure 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 79-33-00-810-837-A | Main Oil Pressure Sensor Electrical Failure Channel A |
| TSM TASK 79-33-00-810-838-A | Main Oil Pressure Sensor Electrical Failure Channel B |
| TSM TASK 79-33-00-810-840-A | Main Oil Pressure Sensor Signal Disagreement |
| TSM TASK 79-33-00-810-841-A | Auxiliary Oil Pressure Sensor Electrical Failure |
| AMM 71-00-00-780-802 | Test No. 13 - Main Oil Pressure Test and Adjustment |
| AMM 71-00-00-860-817 | Motor the Engine (Dry Method) |
| AMM 72-00-00-210-811 | Inspection of the Engine after Engine Oil Overtemperature |
| AMM 72-15-00-200-801 | Borescope Inspection of the Fan Drive Gearbox (FDG) Assembly |
| AMM 73-21-00-710-806 | Test No.7 - EEC Operation Test (Self Test) |
| AMM 79-00-00-210-808 | Oil Consumption Monitoring |
| AMM 79-00-00-210-809 | Visual Inspection of the Main Oil Filter Element for Contamination |
| 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 79-21-01-000-801 | Removal of the Lubrication and Scavenge Oil Pump |
| AMM 79-21-01-400-801 | Installation of the Lubrication and Scavenge Oil Pump |
| AMM 79-33-21-000-801 | Removal of the Main Oil Pressure (MOP) Sensor |
| AMM 79-33-21-400-801 | Installation of the Main Oil Pressure (MOP) Sensor |
| AMM 79-35-00-200-801 |
Subtask 71-00-00-710-141-A ** ON A/C NOT FOR ALL
A. Investigate the Engine after a No Oil Pressure 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 71-00-00-810-148-A ** ON A/C NOT FOR ALL A. Do the steps that follow:
(1) Inspect the oil filter element AMM 79-00-00-210-809.
(2) Inspect the fan drive gearbox system AMM 72-15-00-200-801.
(3) If there is a report of engine oil temperature high, do an inspection of the engine (after engine oil over temperature) AMM 72-00-00-210-811.
(4) If the maintenance messages related to the oil pressure sensor electrical failure on channel A appear with the engine FADEC status maintenance or the ECAM warning for engine oil system fault and amber crosses on oil pressure display, refer to main oil pressure sensor electrical failure (Ref. TSM TASK 79-33-00-810-837).
(5) If the maintenance messages related to the oil pressure sensor electrical failure on channel B appear with the engine FADEC status maintenance or the ECAM warning for engine oil system fault and amber crosses on oil pressure display, refer to main oil pressure sensor electrical failure (Ref. TSM TASK 79-33-00-810-838).
(6) If the maintenance messages related to oil pressure sensor signal disagree appear with the engine FADEC status maintenance, refer to main oil pressure sensor signal disagreement (Ref. TSM TASK 79-33-00-810-840).
(7) Inspect the engine oil for contamination AMM 79-00-00-210-811.
(8) If the maintenance message related to Auxillary Oil Pressure (AOP) sensor electrical failure appears, refers to (Ref. TSM TASK 79-33-00-810-841).
(9) If the maintenance message related to Fan Drive Gearbox (FDGS) Auxillary Pump Failure appears, do a check of the #1 and 1.5 Bearing Compartment Chip Collector AMM 79-00-00-281-802.
(a) If the Magnetic Chip Collector Inspection is not OK, remove the engine from service.
(b) If the Magnetic Chip Collector Inspection is OK, go to the next step.
(10) If there are no EEC monitored faults reported, make sure that the oil tank has been serviced properly AMM 79-00-00-610-801.
(11) If you must service the oil tank check the oil consumption rate AMM 79-00-00-210-808.
(a) If the oil consumption is excessive, check the engine for leaks. Refer to troubleshoot the engine after a high oil consumption event (Ref. TSM TASK 71-00-00-810-846).
(12) If the oil level is satisfactory and if not previously accomplished, do a check the front bearing chip collectors AMM 79-35-00-200-801.
(a) Do check of the remaining chip collectors if not previously accomplished AMM 79-00-00-281-802.
(b) Replace the SENSOR-PRESSURE, MAIN OIL [4071KS] , AMM 79-33-21-000-801 and AMM 79-33-21-400-801.
1 Prior to running the engine, do an Engine Dry Motor. AMM 71-00-00-860-817. Look at the Oil Pressure on the Lower ECAM display.
2 If the Oil Pressure is greater than 0 psi (0 bar) during the Engine Dry Motor, do an Engine Run to Idle to confirm the repair of the Fault.
3 If the Oil Pressure is 0 psi (0 bar) during the Engine Dry Motor, continue to the next step.
(13) If not previously accomplished, replace PUMP-OIL, LUBRICATION AND SCAVENGE [6004EM] AMM 79-21-01-000-801 and AMM 79-21-01-400-801.
(a) Examine the removed Lubrication and Scavenge Oil Pump. If damage is found, inspect the engine oil system AMM 79-00-00-210-811.
1 Use the inspection task to disposition the engine. If the engine is OK, go to the next step.
(14) If not previously accomplished, adjust the main oil pressure AMM 71-00-00-780-802.
(a) If the oil pressure cannot be properly maintained and you do not find any problems, remove the engine from service.
5. Close-up(1) Inspect the oil filter element AMM 79-00-00-210-809.
(2) Inspect the fan drive gearbox system AMM 72-15-00-200-801.
(3) If there is a report of engine oil temperature high, do an inspection of the engine (after engine oil over temperature) AMM 72-00-00-210-811.
(4) If the maintenance messages related to the oil pressure sensor electrical failure on channel A appear with the engine FADEC status maintenance or the ECAM warning for engine oil system fault and amber crosses on oil pressure display, refer to main oil pressure sensor electrical failure (Ref. TSM TASK 79-33-00-810-837).
(5) If the maintenance messages related to the oil pressure sensor electrical failure on channel B appear with the engine FADEC status maintenance or the ECAM warning for engine oil system fault and amber crosses on oil pressure display, refer to main oil pressure sensor electrical failure (Ref. TSM TASK 79-33-00-810-838).
(6) If the maintenance messages related to oil pressure sensor signal disagree appear with the engine FADEC status maintenance, refer to main oil pressure sensor signal disagreement (Ref. TSM TASK 79-33-00-810-840).
(7) Inspect the engine oil for contamination AMM 79-00-00-210-811.
(8) If the maintenance message related to Auxillary Oil Pressure (AOP) sensor electrical failure appears, refers to (Ref. TSM TASK 79-33-00-810-841).
(9) If the maintenance message related to Fan Drive Gearbox (FDGS) Auxillary Pump Failure appears, do a check of the #1 and 1.5 Bearing Compartment Chip Collector AMM 79-00-00-281-802.
(a) If the Magnetic Chip Collector Inspection is not OK, remove the engine from service.
(b) If the Magnetic Chip Collector Inspection is OK, go to the next step.
(10) If there are no EEC monitored faults reported, make sure that the oil tank has been serviced properly AMM 79-00-00-610-801.
(11) If you must service the oil tank check the oil consumption rate AMM 79-00-00-210-808.
(a) If the oil consumption is excessive, check the engine for leaks. Refer to troubleshoot the engine after a high oil consumption event (Ref. TSM TASK 71-00-00-810-846).
(12) If the oil level is satisfactory and if not previously accomplished, do a check the front bearing chip collectors AMM 79-35-00-200-801.
(a) Do check of the remaining chip collectors if not previously accomplished AMM 79-00-00-281-802.
(b) Replace the SENSOR-PRESSURE, MAIN OIL [4071KS] , AMM 79-33-21-000-801 and AMM 79-33-21-400-801.
1 Prior to running the engine, do an Engine Dry Motor. AMM 71-00-00-860-817. Look at the Oil Pressure on the Lower ECAM display.
2 If the Oil Pressure is greater than 0 psi (0 bar) during the Engine Dry Motor, do an Engine Run to Idle to confirm the repair of the Fault.
3 If the Oil Pressure is 0 psi (0 bar) during the Engine Dry Motor, continue to the next step.
(13) If not previously accomplished, replace PUMP-OIL, LUBRICATION AND SCAVENGE [6004EM] AMM 79-21-01-000-801 and AMM 79-21-01-400-801.
(a) Examine the removed Lubrication and Scavenge Oil Pump. If damage is found, inspect the engine oil system AMM 79-00-00-210-811.
1 Use the inspection task to disposition the engine. If the engine is OK, go to the next step.
(14) If not previously accomplished, adjust the main oil pressure AMM 71-00-00-780-802.
(a) If the oil pressure cannot be properly maintained and you do not find any problems, remove the engine from service.
Subtask 71-00-00-860-095-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.