DOC AIRBUS | AMM A320FInspection of the Engine after Engine Windmilling [PW11]
TASK 72-00-00-210-814-A
Inspection of the Engine after Engine Windmilling
Use this inspection procedure to examine the engine after engine windmilling which occurs after an engine In-Flight Shut Down (IFSD).
2. Job Set-up Information
A. Work Zones and Access Panels
B. Referenced Information
3. Job Set-up
Subtask 72-00-00-860-104-A ** ON A/C NOT FOR ALL
Subtask 72-00-00-210-165-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:47:22 UTC
Inspection of the Engine after Engine Windmilling
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 INSTRUCTION, INJURY CAN OCCUR.
ZONE: 400
1. Reason for the JobUse this inspection procedure to examine the engine after engine windmilling which occurs after an engine In-Flight Shut Down (IFSD).
2. Job Set-up Information
A. Work Zones and Access Panels
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-720-811-A | Test No. 3A - Idle Power Test |
| TASK 79-00-00-210-811-A | Laboratory Analysis of the Engine Oil for Contamination |
| TASK 79-00-00-281-802-A | Inspection of the Magnetic Chip Collectors for Oil Contamination |
| TASK 79-00-00-281-804-A | Sampling of the Engine Oil |
| TASK 79-00-00-610-802-A | Change the Engine Oil |
| TASK 79-21-06-960-801-A | Replace the Oil Filter Element |
| TASK 79-22-01-000-801-A | Removal and Inspection of the Magnetic Chip Collector Assemblies |
| TSM 72-15-00-810-801 | FDGS Aux Pump Failure |
Subtask 72-00-00-860-104-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 72-00-00-210-165-A ** ON A/C NOT FOR ALL
A. Inspection of the Engine after Windmilling
(2) You must make a record of the IFSD conditions as follows:
(a) Make a record of the main oil pressure and oil temperature before the IFSD.
(b) Make a record of the main oil pressure and oil temperature after the IFSD and during the windmilling operation.
(c) If the oil main pressure was 5 psi (0.34 bar) or less, make a record of how much time it was 5 psi (0.34 bar) or less.
(d) If a "FDGS aux pump failed" fault was recorded during windmilling, perform the necessary troubleshooting TSM 72-15-00-810-801.
(e) Make a record of any other engine condition that is not satisfactory (such as high exhaust gas temperature or high vibration).
(f) These conditions are necessary for this inspection procedure and this inspection data must stay with the engine.
(3) If the cause of the IFSD was any of the conditions that follow, remove the engine from service and do an inspection of the engine bearing compartments and fan drive gear system:
(a) The engine was shut down from idle speed or more because the oil pressure was less than the minimum operational limit for more than ten seconds before the fuel was shut off.
(b) The engine was shut down at power because the main oil temperature was more than the limits.
(c) The oil pressure stopped (zero oil pressure) for more than ten seconds. Possible causes are N2 rotor or gearbox that did not turn or broken oil pump.
(d) The engine operated or windmilled without engine oil in the oil system. Possible causes are broken oil lines or oil system leaks.
(e) The engine oil pump was broken or damaged. Possible causes are broken pump shaft or gears.
(4) For engines that windmilled after an IFSD and had continuous engine oil pressure more than 5 psi (0.34 bar) during the windmilling operation, no oil system inspections are necessary.
(5) For engines that windmilled after an IFSD and did not have continuous engine oil pressure more than 5 psi (0.34 bar) or experienced an engine oil system related fault, do the steps that follow:
(a) Remove and examine the main oil filter element for metal chips (Ref. AMM TASK 79-21-06-960-801) and (Ref. AMM TASK 79-00-00-281-804).
(b) Remove and examine the six magnetic chip collectors for metal chips (Ref. AMM TASK 79-00-00-281-802).
(c) If you see metal chips in the main oil filter element or any of the magnetic chip collectors, do an inspection of the oil system for contamination (Ref. AMM TASK 79-00-00-210-811).
1 This procedure gives instructions on how to examine the debris found on the magnetic chip collector probes and in the main oil filter element.
2 A description and source of the types of debris that can be found is also given.
3 You must find the source of the debris.
4 You must do all the necessary inspections and repairs before the engine can continue in service.
(d) If you do not see metal chips in the main oil filter element or any of the magnetic chip collectors, do the steps as follow:
1 Do the servicing of the engine oil system (Ref. AMM TASK 79-00-00-610-802).
2 Start the engine and operate at idle power for five minutes (Ref. AMM TASK 71-00-00-720-811).
3 After the engine shutdown, do the oil system inspections as follows:
a Remove and examine the main oil filter element for metal chips (Ref. AMM TASK 79-21-06-960-801) and (Ref. AMM TASK 79-00-00-281-804).
b Remove and examine the six magnetic chip collectors for metal chips (Ref. AMM TASK 79-22-01-000-801) and (Ref. AMM TASK 79-00-00-281-804).
4 If you do not see metal chips in the main oil filter element or any of the magnetic chip collectors, the engine can continue in service but the oil filter and chip collectors must be examined again as follows:
a Examine the main oil filter element and the six magnetic chip collectors again after the first flight.
b Examine the main oil filter element and the six magnetic chip collectors again after 50 hours.
c Examine the main oil filter element and the six magnetic chip collectors again after 100 hours.
(6) Examine the assembly for foreign objects, damage and correct assembly.
CAUTION:
AFTER AN IN FLIGHT SHUTDOWN (IFSD), YOU MUST FIND AND CORRECT THE CAUSE OF THE MALFUNCTION BEFORE THE ENGINE IS USED IN SERVICE AGAIN.
(1) Engine windmilling occurs after an In-Flight ShutDown (IFSD). (2) You must make a record of the IFSD conditions as follows:
(a) Make a record of the main oil pressure and oil temperature before the IFSD.
(b) Make a record of the main oil pressure and oil temperature after the IFSD and during the windmilling operation.
(c) If the oil main pressure was 5 psi (0.34 bar) or less, make a record of how much time it was 5 psi (0.34 bar) or less.
(d) If a "FDGS aux pump failed" fault was recorded during windmilling, perform the necessary troubleshooting TSM 72-15-00-810-801.
(e) Make a record of any other engine condition that is not satisfactory (such as high exhaust gas temperature or high vibration).
(f) These conditions are necessary for this inspection procedure and this inspection data must stay with the engine.
(3) If the cause of the IFSD was any of the conditions that follow, remove the engine from service and do an inspection of the engine bearing compartments and fan drive gear system:
(a) The engine was shut down from idle speed or more because the oil pressure was less than the minimum operational limit for more than ten seconds before the fuel was shut off.
(b) The engine was shut down at power because the main oil temperature was more than the limits.
(c) The oil pressure stopped (zero oil pressure) for more than ten seconds. Possible causes are N2 rotor or gearbox that did not turn or broken oil pump.
(d) The engine operated or windmilled without engine oil in the oil system. Possible causes are broken oil lines or oil system leaks.
(e) The engine oil pump was broken or damaged. Possible causes are broken pump shaft or gears.
(4) For engines that windmilled after an IFSD and had continuous engine oil pressure more than 5 psi (0.34 bar) during the windmilling operation, no oil system inspections are necessary.
(5) For engines that windmilled after an IFSD and did not have continuous engine oil pressure more than 5 psi (0.34 bar) or experienced an engine oil system related fault, do the steps that follow:
(a) Remove and examine the main oil filter element for metal chips (Ref. AMM TASK 79-21-06-960-801) and (Ref. AMM TASK 79-00-00-281-804).
(b) Remove and examine the six magnetic chip collectors for metal chips (Ref. AMM TASK 79-00-00-281-802).
(c) If you see metal chips in the main oil filter element or any of the magnetic chip collectors, do an inspection of the oil system for contamination (Ref. AMM TASK 79-00-00-210-811).
1 This procedure gives instructions on how to examine the debris found on the magnetic chip collector probes and in the main oil filter element.
2 A description and source of the types of debris that can be found is also given.
3 You must find the source of the debris.
4 You must do all the necessary inspections and repairs before the engine can continue in service.
(d) If you do not see metal chips in the main oil filter element or any of the magnetic chip collectors, do the steps as follow:
1 Do the servicing of the engine oil system (Ref. AMM TASK 79-00-00-610-802).
2 Start the engine and operate at idle power for five minutes (Ref. AMM TASK 71-00-00-720-811).
3 After the engine shutdown, do the oil system inspections as follows:
a Remove and examine the main oil filter element for metal chips (Ref. AMM TASK 79-21-06-960-801) and (Ref. AMM TASK 79-00-00-281-804).
b Remove and examine the six magnetic chip collectors for metal chips (Ref. AMM TASK 79-22-01-000-801) and (Ref. AMM TASK 79-00-00-281-804).
4 If you do not see metal chips in the main oil filter element or any of the magnetic chip collectors, the engine can continue in service but the oil filter and chip collectors must be examined again as follows:
a Examine the main oil filter element and the six magnetic chip collectors again after the first flight.
b Examine the main oil filter element and the six magnetic chip collectors again after 50 hours.
c Examine the main oil filter element and the six magnetic chip collectors again after 100 hours.
(6) Examine the assembly for foreign objects, damage and correct assembly.