DOC AIRBUS | AMM A320FPreservation of an Engine for a Period up to 10 days [CFML]
TASK 72-00-00-620-803-A
Preservation of an Engine for a Period up to 10 days
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-00-00-860-118-A
Subtask 72-00-00-620-074-A
[Rev.10 from 2021]
2026.04.01 02:50:31 UTC
Preservation of an Engine for a Period up to 10 days
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
ZONE: 400
1. Reason for the JobSelf explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | COVER - INLET |
| No specific | 1 | INDICATOR-HUMIDITY |
| 98N1010H001-000 | 1 | INLET COVER |
| 98N1010H005-000 | 1 | EXHAUST COVER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2098) | desiccant bags |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 400 | POWER PLANT, NACELLES AND PYLONS |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-79-610-805-A | Check of the Oil Level and Replenishing |
| TASK 12-13-79-610-808-A | Draining of the Oil Tank |
| TASK 71-00-00-700-805-A | Dry-Motoring Check |
| TASK 71-00-00-860-827-A | Start the Engine (Normal Automatic Start) |
| TASK 71-00-00-860-828-A | Start the Engine (Normal Manual Start) |
| TASK 71-00-00-860-829-A | Engine Shutdown |
| TASK 72-00-00-600-804-A | Recommendation for Engine Preservation |
| TSM 79-31-00-810-825 | The Engine Oil Quantity is Greater than 22.87 Quarts |
Subtask 72-00-00-860-118-A
A. Not Applicable
4. ProcedureSubtask 72-00-00-620-074-A
A. Preservation for a Period Up to 10 Days
(1) Power plant preservation (Operable):
(a) If the engine has not been started and operated at the idle-power speed for a minimum of three minutes during the last engine operation, do these steps:
1 Start the engine procedure (selection) (Ref. AMM TASK 71-00-00-860-827) or (Ref. AMM TASK 71-00-00-860-828).
2 Let the engine become stable for three minutes at ground idle.
3 Stop the engine procedure (usual engine stop) (Ref. AMM TASK 71-00-00-860-829).
4 In less than 1 hour after engine shutdown, do a check of the oil level on the oil tank sight glass. If the oil level is above the top of the oil tank sight glass, do as follows:
a Drain the oil tank down to -3QT sight glass indication (Ref. AMM TASK 12-13-79-610-808).
b Do this task: start the engine (normal start) (Ref. AMM TASK 71-00-00-860-827).
c Operate the engine at stable ground idle for 3 minutes.
d Do this task: stop the engine procedure (usual engine stop) (Ref. AMM TASK 71-00-00-860-829).
e Inspect again the oil level on the oil tank sight glass in less than 1 hour after engine shutdown.
f If the oil level is still above the MAX level, repeat Para 4.A.(1)(a)4_a_ to Para 4.A.(1)(a)4_e_ until the oil level is visible on the oil tank sight glass.
g At first opportunity, do the troubleshooting for the cause of oil over-servicing per TSM 79-31-00-810-825.
h Until you complete troubleshooting of Para 4.A.(1)(a)4_g_, do not perform anymore AMM oil tank servicing ( (Ref. AMM TASK 12-13-79-610-805)) on a cold engine. Perform only oil tank servicing on warm engine (less than 1 hour after engine shutdown).
1 If the engine inlet cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
2 When using plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth (CP2674) and solvent (B00666) to wipe the area where the tape (G00920) will be used.
b Cut approximately 70 in. (1.8 m) diameter circle from plastic sheet.
c Tape the plastic circle on forward edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of overlapping tape (G00920) around the perimeter of the inlet acoustic panel.
3 If the engine exhaust cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
1 If the engine inlet cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
2 When using plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth (CP2674) and solvent (B00666) to wipe the area where the tape (G00920) will be used.
b Cut approximately 70 in. (1.8 m) diameter circle from plastic sheet.
c Tape the plastic circle on forward edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of overlapping tape (G00920) around the perimeter of the inlet acoustic panel.
3 If the engine exhaust cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
(1) Power plant preservation (Operable):
(a) If the engine has not been started and operated at the idle-power speed for a minimum of three minutes during the last engine operation, do these steps:
1 Start the engine procedure (selection) (Ref. AMM TASK 71-00-00-860-827) or (Ref. AMM TASK 71-00-00-860-828).
2 Let the engine become stable for three minutes at ground idle.
3 Stop the engine procedure (usual engine stop) (Ref. AMM TASK 71-00-00-860-829).
4 In less than 1 hour after engine shutdown, do a check of the oil level on the oil tank sight glass. If the oil level is above the top of the oil tank sight glass, do as follows:
a Drain the oil tank down to -3QT sight glass indication (Ref. AMM TASK 12-13-79-610-808).
b Do this task: start the engine (normal start) (Ref. AMM TASK 71-00-00-860-827).
c Operate the engine at stable ground idle for 3 minutes.
d Do this task: stop the engine procedure (usual engine stop) (Ref. AMM TASK 71-00-00-860-829).
e Inspect again the oil level on the oil tank sight glass in less than 1 hour after engine shutdown.
f If the oil level is still above the MAX level, repeat Para 4.A.(1)(a)4_a_ to Para 4.A.(1)(a)4_e_ until the oil level is visible on the oil tank sight glass.
g At first opportunity, do the troubleshooting for the cause of oil over-servicing per TSM 79-31-00-810-825.
h Until you complete troubleshooting of Para 4.A.(1)(a)4_g_, do not perform anymore AMM oil tank servicing ( (Ref. AMM TASK 12-13-79-610-805)) on a cold engine. Perform only oil tank servicing on warm engine (less than 1 hour after engine shutdown).
NOTE: Dry motor the engine (Ref. AMM TASK 71-00-00-700-805) for two minutes in order to reduce risk of fuel nozzle coking.
(b) If necessary and as described in (Ref. AMM TASK 72-00-00-600-804), install desiccant bags (Material No.CP2098) with INDICATOR-HUMIDITY in the inlet and in the exhaust of the engine and monitor them during preservation period.NOTE: The best condition for engine storage is to keep an environment with less than 70% of humidity.
(c) Install the COVER - INLET or 98N1010H001-000 INLET COVER and the 98N1010H005-000 EXHAUST COVER to prevent fan windmilling and to prevent Foreign Object Damage (FOD). 1 If the engine inlet cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
2 When using plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth (CP2674) and solvent (B00666) to wipe the area where the tape (G00920) will be used.
b Cut approximately 70 in. (1.8 m) diameter circle from plastic sheet.
c Tape the plastic circle on forward edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of overlapping tape (G00920) around the perimeter of the inlet acoustic panel.
NOTE: Do not place plastic or tape (G00920) over the lipskin or encase the lipskin with plastic.
d Apply the tape (G00920) across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.3 If the engine exhaust cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
NOTE: When applying plastic sheeting and tape (G00920) to the exhaust, make sure that the drain holes or tubes are open and not covered.
(2) Power plant preservation (Non-operable): NOTE: If the engine had an in-flight shutdown, contact CFM: cfm.csc@safrangroup.com.
(a) Install the COVER - INLET or 98N1010H001-000 INLET COVER and the 98N1010H005-000 EXHAUST COVER to prevent fan windmilling and to prevent FOD. 1 If the engine inlet cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
2 When using plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth (CP2674) and solvent (B00666) to wipe the area where the tape (G00920) will be used.
b Cut approximately 70 in. (1.8 m) diameter circle from plastic sheet.
c Tape the plastic circle on forward edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of overlapping tape (G00920) around the perimeter of the inlet acoustic panel.
NOTE: Do not place plastic or tape (G00920) over the lipskin or encase the lipskin with plastic.
d Apply the tape (G00920) across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.3 If the engine exhaust cover is not available, use barrier material (G00253), polyethylene film (G00252) or equivalent 6 MIL or thicker material, and tape (G00920).
NOTE: When applying plastic sheeting and tape (G00920) to the exhaust, make sure that the drain holes or tubes are open and not covered.
(b) When this task is done, the engine is preserved for 10 days from the time of its last operation or from the completion of the engine dry-out procedure, as applicable.