DOC AIRBUS | AMM A320FPreservation of an Engine for a Period up to 30 days [CFML]
TASK 72-00-00-620-804-A
Preservation of an Engine for a Period up to 30 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 72-00-00-860-119-A
Subtask 72-00-00-620-075-A
[Rev.10 from 2021]
2026.04.01 12:54:29 UTC
Preservation of an Engine for a Period up to 30 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 | AR | CAP - PROTECTION |
| No specific | AR | COVER - PROTECTION |
| No specific | 1 | INDICATOR-HUMIDITY |
| 856A2930 | 1 | COVER FITTED BARE QEC ENGINE SHIPPING |
| 98N1010H001-000 | 1 | INLET COVER |
| 98N1010H005-000 | 1 | EXHAUST COVER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2098) | desiccant bags |
| (Material No.CP2160) | vapor barrier film |
| vapor barrier film |
| 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 |
| TASK 75-31-10-210-801-A | Visual Inspection of the Variable Bleed Valve (VBV) Doors |
| TSM 79-31-00-810-825 | The Engine Oil Quantity is Greater than 22.87 Quarts |
Subtask 72-00-00-860-119-A
A. Not Applicable
4. ProcedureSubtask 72-00-00-620-075-A
A. Preservation for a Period not more than 30 Days
(1) Operable engine preservation:
(a) On-wing installed engines:
1 Start the engine (Ref. AMM TASK 71-00-00-860-827) or (Ref. AMM TASK 71-00-00-860-828).
2 Let it become stable at ground idle for 15-20 minutes.
3 Stop the engine (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).
CP2160 vapor barrier film
a 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).
b When using plastic sheeting to cover the inlet, do the steps that follow:
1 Tow stand base (dolly) to an area with sufficient ventilation and a flat surface.
2 Carefully raise stand base with a FORKLIFT.
3 Remove the pins, raise and stow the four caster wheels of stand base.
4 Lower stand base to level surface, remove the FORKLIFT.
5 Attach the forward and aft caster wheels with pins.
6 Remove the cover fitted bare Quick Engine Change (QEC) engine shipping from the engine.
7 Do the engine motoring procedure at maximum motoring speed for four minutes and shut down.
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)(b)8_a_ to Para 4.A.(1)(b)8_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)(b)8_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).
9 Make sure that VBV doors are closed (Ref. AMM TASK 75-31-10-210-801).
13 Seal front and back openings/exposed areas with vapor barrier film (Material No.CP2160) .
14 Cover full engine with cover fitted bare QEC engine shipping and attach tightly in place.
15 Raise stand base with a FORKLIFT.
16 Deploy, lower and pin caster wheels of stand base.
17 Lower stand base and remove the FORKLIFT.
18 Tow stand base (dolly) with engine to storage area.
(2) Non-operable engines preservation:
(e) Put the desiccant bags (Material No.CP2098) with INDICATOR-HUMIDITY to be placed, on either side of the engine, but not in contact with the engine hardware.
(f) Cover full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING and attach tightly in place, if in a trailer or stand. If on wing, cover entrance of fan cowling and exit opening of tailpipe.
(1) Operable engine preservation:
(a) On-wing installed engines:
1 Start the engine (Ref. AMM TASK 71-00-00-860-827) or (Ref. AMM TASK 71-00-00-860-828).
2 Let it become stable at ground idle for 15-20 minutes.
3 Stop the engine (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: You can ignore Para 4.A.(1)(a)1_ to Para 4.A.(1)(a)4_ if it was done during the last engine operation (flight cycle). Under these conditions, consider the engine is preserved for 30 days from time of last operation.
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.
5 If necessary and as described in (Ref. AMM TASK 72-00-00-600-804), install desiccant bags (Material No.CP2098) in the inlet and in the exhaust of the engine and monitor them during preservation period.NOTE: The best condition for engine stored is to keep an environment with less than 70% of humidity.
CAUTION:
IT IS NOT PERMITTED TO USE:
- WHITE TESA 4651 TAPE
- GREY TESA 4651 TAPE
- YELLOW TESA 4651 TAPE
- RED TESA 4651 TAPE
- GREEN TESA 4651 TAPE
- RED TAPE 3M 471.
IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PARTS CAN OCCUR.
6 Cover Variable Bleed Valve (VBV) grids with - Blue tape 3M 471 (CP2109)
- Blue, brown or black tesa 4651 tape (CP2158).
a 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).
b When using plastic sheeting to cover the inlet, do the steps that follow:
- Use a lint-free cloth (CP2674) and solvent (B00666) to wipe the area where the tape (G00920) will be used.
- Cut approximately 70 in. (1.8 m) diameter circle from plastic sheet.
- 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.
- Apply the tape (G00920) across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.
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) Engines installed on stand: 1 Tow stand base (dolly) to an area with sufficient ventilation and a flat surface.
2 Carefully raise stand base with a FORKLIFT.
3 Remove the pins, raise and stow the four caster wheels of stand base.
4 Lower stand base to level surface, remove the FORKLIFT.
5 Attach the forward and aft caster wheels with pins.
6 Remove the cover fitted bare Quick Engine Change (QEC) engine shipping from the engine.
7 Do the engine motoring procedure at maximum motoring speed for four minutes and shut down.
NOTE: When you do the engine motoring procedure on stand, you can connect a start cart hose to the starter shutoff valve with a locally manufactured adapter (Ref. AMM TASK 71-00-00-860-827) and (Ref. AMM TASK 71-00-00-860-828).
8 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)(b)8_a_ to Para 4.A.(1)(b)8_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)(b)8_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).
9 Make sure that VBV doors are closed (Ref. AMM TASK 75-31-10-210-801).
CAUTION:
IT IS NOT PERMITTED TO USE:
- WHITE TESA 4651 TAPE
- GREY TESA 4651 TAPE
- YELLOW TESA 4651 TAPE
- RED TESA 4651 TAPE
- GREEN TESA 4651 TAPE
- RED TAPE 3M 471.
IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PARTS CAN OCCUR.
10 Cover VBV grids with vapor barrier film (Material No.CP2160) or with one of the following alternative VBV grids protections:- Blue tape 3M 471 (CP2109)
- Blue, brown or black tesa 4651 tape (CP2158).
NOTE: Drain holes or tubes are not to be capped or covered.
12 Put the desiccant bags (Material No.CP2098) with INDICATOR-HUMIDITY on both sides of the engine, but not in contact with the engine hardware.13 Seal front and back openings/exposed areas with vapor barrier film (Material No.CP2160) .
14 Cover full engine with cover fitted bare QEC engine shipping and attach tightly in place.
15 Raise stand base with a FORKLIFT.
16 Deploy, lower and pin caster wheels of stand base.
17 Lower stand base and remove the FORKLIFT.
18 Tow stand base (dolly) with engine to storage area.
(2) Non-operable engines preservation:
NOTE: If the engine was ferried or subjected to an in-flight shut down, contact CFM: cfm.csc@safrangroup.com.
NOTE: If engine is non-operable, consider the engine is preserved for 30 days from time of last operation.
(a) Make sure that VBV doors are closed (Ref. AMM TASK 75-31-10-210-801). CAUTION:
IT IS NOT PERMITTED TO USE:
- WHITE TESA 4651 TAPE
- GREY TESA 4651 TAPE
- YELLOW TESA 4651 TAPE
- RED TESA 4651 TAPE
- GREEN TESA 4651 TAPE
- RED TAPE 3M 471.
IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE PARTS CAN OCCUR.
(b) Cover VBV grids with vapor barrier film (Material No.CP2160) or with one of the following alternative VBV grids protections:- Blue tape 3M 471 (CP2109)
- Blue, brown or black tesa 4651 tape (CP2158).
NOTE: Drain holes or tubes are not to be capped or covered.
(d) Seal front and back openings/exposed areas with vapor barrier film (Material No.CP2160) . (e) Put the desiccant bags (Material No.CP2098) with INDICATOR-HUMIDITY to be placed, on either side of the engine, but not in contact with the engine hardware.
(f) Cover full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING and attach tightly in place, if in a trailer or stand. If on wing, cover entrance of fan cowling and exit opening of tailpipe.