DOC AIRBUS | AMM A320FPreservation for a Period of up to 90 Days [CFMB]
TASK 72-00-00-600-025-A
Preservation for a Period of up to 90 Days
1. Reason for the Job
You must do the preservation procedure at the end of engine operation or not earlier than one day before an engine return to shop, when the engine must not operate for a period up to 90 days.
This procedure is only applicable to on-wing installed engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 72-00-00-869-067-A ** ON A/C NOT FOR ALL
Subtask 72-00-00-620-058-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:40:31 UTC
Preservation for a Period of up to 90 Days
1. Reason for the Job
You must do the preservation procedure at the end of engine operation or not earlier than one day before an engine return to shop, when the engine must not operate for a period up to 90 days.
This procedure is only applicable to on-wing installed engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| 856A2930 | AR | COVER FITTED BARE QEC ENGINE SHIPPING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2098) | desicant bags with humidity indicator |
| (Material No.CP2160) | vapor barrier film |
| (Material No.CP2442) | engine oil |
| (Material No.CP5067) | lubrication system corrosion preventive oil |
| (Material No.CP5075) | corrosion protective additive |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-13-79-610-002-A | Check oil level and replenish Check Pop Out Indicator of EMCD (Electrical Master Chip Detector) |
| TASK 12-13-79-610-002-A-01 | Check oil level and replenish (Pressure Filling) |
| TASK 12-13-79-610-003-C | Oil Tank Draining |
| TASK 71-00-00-710-001-B | Dry Motoring Check |
| TASK 71-00-00-710-003-B | Engine Automatic Start |
| TASK 71-00-00-710-028-B | Engine Shutdown |
| TASK 72-00-00-600-026-A | Recommendations for Engine Preservation |
| TASK 72-00-00-600-811-A | Desiccant Bags Inspection Procedure |
| TASK 75-31-20-820-001-A | Set the Variable Bleed Valve Assembly to the Closed position |
| TASK 78-31-00-710-043-A-01 | Operational Test of the Thrust Reverser without CFDS - Engine Running |
| TASK 78-31-00-710-043-A | Operational Test of the Thrust Reverser without CFDS - Engine Not Running |
| TASK 78-31-00-710-043-A-01 | Operational Test of the Thrust Reverser without CFDS - Engine Running |
Subtask 72-00-00-869-067-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 72-00-00-620-058-A ** ON A/C NOT FOR ALL
A. Preservation for a Period of up to 90 days.
Subtask 72-00-00-620-068-A ** ON A/C NOT FOR ALL B. Operable Engine Preservation - Period of Up to 90 days.
(1) Method 1 (oil drain)
(a) Drain the oil tank (Ref. AMM TASK 12-13-79-610-003) and do the servicing of the oil tank with an approved mixture of engine oil (Material No.CP2442) and at least 5 percent of lubrication system corrosion preventive oil (Material No.CP5067) or, as an alternative, 7 percent corrosion protective additive (Material No.CP5075) by volume (Ref. AMM TASK 12-13-79-610-002).
(c) When the engine cannot be operated at idle condition, dry motor the engine for 4 minutes (Ref. AMM TASK 71-00-00-710-001).
(a) Directly add the appropriate amount of corrosion preventative oil or corrosion inhibitor to the oil remaining in the tank.
If necessary, partially drain the oil tank before adding the additive to prevent over servicing.
In this case, add 1 quart of lubrication system corrosion preventive oil (Material No.CP5067) or 1.4 quarts of corrosion protective additive (Material No.CP5075) in the oil tank.
Complete the servicing with engine oil (Material No.CP2442) up to the full mark after adding the additive.
In this case, operating the engine at ground idle (step (b) below) is necessary and cannot be replaced by dry motoring.
(b) Start the engine (Ref. AMM TASK 71-00-00-710-003) and let it become stable at ground idle for 15-20 minutes, followed by a full thrust reverser cycle (Ref. AMM TASK 78-31-00-710-043) then stop the engine (Ref. AMM TASK 71-00-00-710-028).
(3) Make sure that the Variable Bleed Valve (VBV) doors are closed (Ref. AMM TASK 75-31-20-820-001).
(4) Cover the VBV grills with vapor barrier film (Material No.CP2160) .
(5) Cap or cover all strut, piping, accessory openings and electrical connections.
(6) If necessary, as described in (Ref. AMM TASK 72-00-00-600-026), install desiccant bags and humidity indicator card in inlet and exhaust of the engine and monitor them during the preservation period.
(b) Attach the desicant bags with humidity indicator (Material No.CP2098) in inlet and exhausts of the engine. Make sure they are not in contact with the engine hardware.
(c) If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
(7) If desiccant bags are installed, seal inlet and exhausts of the engine with vapor barrier film (Material No.CP2160) .
(8) Put the adequate protective cover that follows:
(a) If the engine is stored off-wing, cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2782G01/G02) Make sure it is tight fitted to the engine.
(b) If the engine is stored on-wing, put a waterproof cover over the whole powerplant. Make sure it is tight fitted to the powerplant. If not possible, as an alternative, cover the entrance to fan inlet cowl and exit openings of exhaust nozzle and exhaust plug.
(c) If the engine inlet and exhaust covers are not available, use barrier material compliant with specification MIL-PRF-121, polyethylene film ASTM D2103 or equivalent 6 mil or thicker material, and tape ASTM D5486.
1 When you apply plastic sheeting and tape to the exhaust, make sure that the drain holes or tubes are clear and not covered.
2 When you use plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth and solvent (spec BMS11-9), to wipe the area where the tape is used.
b Cut an approximate inlet diameter circle from plastic sheet. Put tape on the plastic circle on FWD edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of tape with overlap around the perimeter of the inlet acoustic panel.
c Do not place plastic or tape over the lipskin or cover the lipskin with plastic.
d Apply the tape across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.
Subtask 72-00-00-620-069-A ** ON A/C NOT FOR ALL (1) Method 1 (oil drain)
(a) Drain the oil tank (Ref. AMM TASK 12-13-79-610-003) and do the servicing of the oil tank with an approved mixture of engine oil (Material No.CP2442) and at least 5 percent of lubrication system corrosion preventive oil (Material No.CP5067) or, as an alternative, 7 percent corrosion protective additive (Material No.CP5075) by volume (Ref. AMM TASK 12-13-79-610-002).
NOTE: In both cases, a minimum of 19 l (5 USgal) of oil mixture is necessary for preservation motoring.
(b) Start the engine (Ref. AMM TASK 71-00-00-710-003) and let it become stable at ground idle for 15-20 minutes, followed by a full thrust reverser cycle (Ref. AMM TASK 78-31-00-710-043) then stop the engine (Ref. AMM TASK 71-00-00-710-028).(c) When the engine cannot be operated at idle condition, dry motor the engine for 4 minutes (Ref. AMM TASK 71-00-00-710-001).
NOTE: Refer to starter limitation to determine the number of dry motoring cycles to ensure total motoring time (Ref. AMM TASK 71-00-00-710-001).
NOTE: Preferred method to preserve the engine is by doing an idle run. During engine idle run, both oil and fuel circulate through its system. During engine dry motor, the fuel does not circulate through the complete fuel system.
(2) Method 2 (no oil drain)(a) Directly add the appropriate amount of corrosion preventative oil or corrosion inhibitor to the oil remaining in the tank.
If necessary, partially drain the oil tank before adding the additive to prevent over servicing.
In this case, add 1 quart of lubrication system corrosion preventive oil (Material No.CP5067) or 1.4 quarts of corrosion protective additive (Material No.CP5075) in the oil tank.
Complete the servicing with engine oil (Material No.CP2442) up to the full mark after adding the additive.
In this case, operating the engine at ground idle (step (b) below) is necessary and cannot be replaced by dry motoring.
(b) Start the engine (Ref. AMM TASK 71-00-00-710-003) and let it become stable at ground idle for 15-20 minutes, followed by a full thrust reverser cycle (Ref. AMM TASK 78-31-00-710-043) then stop the engine (Ref. AMM TASK 71-00-00-710-028).
(3) Make sure that the Variable Bleed Valve (VBV) doors are closed (Ref. AMM TASK 75-31-20-820-001).
(4) Cover the VBV grills with vapor barrier film (Material No.CP2160) .
(5) Cap or cover all strut, piping, accessory openings and electrical connections.
(6) If necessary, as described in (Ref. AMM TASK 72-00-00-600-026), install desiccant bags and humidity indicator card in inlet and exhaust of the engine and monitor them during the preservation period.
NOTE: The best condition for engine storage is to keep an environment with less than 70 percent of humidity. (Ref. AMM TASK 72-00-00-600-811) for desiccant bag inspection.
NOTE: desicant bags with humidity indicator (Material No.CP2098) must be inspected/replaced at regular intervals depending on weather conditions. Make sure they are accessible for inspection/replacement while disturbing a minimum amount of protective material. For inspection's instructions, do this task (Ref. AMM TASK 72-00-00-600-811).
(a) Mark the date on the humidity indicator tags. (b) Attach the desicant bags with humidity indicator (Material No.CP2098) in inlet and exhausts of the engine. Make sure they are not in contact with the engine hardware.
(c) If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
(7) If desiccant bags are installed, seal inlet and exhausts of the engine with vapor barrier film (Material No.CP2160) .
(8) Put the adequate protective cover that follows:
(a) If the engine is stored off-wing, cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2782G01/G02) Make sure it is tight fitted to the engine.
(b) If the engine is stored on-wing, put a waterproof cover over the whole powerplant. Make sure it is tight fitted to the powerplant. If not possible, as an alternative, cover the entrance to fan inlet cowl and exit openings of exhaust nozzle and exhaust plug.
(c) If the engine inlet and exhaust covers are not available, use barrier material compliant with specification MIL-PRF-121, polyethylene film ASTM D2103 or equivalent 6 mil or thicker material, and tape ASTM D5486.
1 When you apply plastic sheeting and tape to the exhaust, make sure that the drain holes or tubes are clear and not covered.
2 When you use plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth and solvent (spec BMS11-9), to wipe the area where the tape is used.
b Cut an approximate inlet diameter circle from plastic sheet. Put tape on the plastic circle on FWD edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of tape with overlap around the perimeter of the inlet acoustic panel.
c Do not place plastic or tape over the lipskin or cover the lipskin with plastic.
d Apply the tape across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.
NOTE: For a period of up to 90 days, the preservation of the fuel system is not necessary.
C. Alternative Procedure. Operable Engine Preservation one Day before the Preservation Plan-Period of Up to 90 days.
(a) Drain the oil tank (Ref. AMM TASK 12-13-79-610-003) and do the servicing of the oil tank with an approved mixture of engine oil (Material No.CP2442) and at least 5 percent of lubrication system corrosion preventive oil (Material No.CP5067) by volume (Ref. AMM TASK 12-13-79-610-002).
(a) Directly add the appropriate amount of corrosion preventative oil or corrosion inhibitor to the oil remaining in the tank.
If necessary, partially drain the oil tank before adding the additive to prevent over servicing.
In this case, add 1 quart of lubrication system corrosion preventive oil (Material No.CP5067) or 1.4 quarts of corrosion protective additive (Material No.CP5075) in the oil tank.
If necessary, complete the servicing with engine oil (Material No.CP2442) up to the full mark after adding the additive.
(3) After the last flight, make sure that the VBV doors are closed (Ref. AMM TASK 75-31-20-820-001).
(4) Cover the VBV grills with vapor barrier film (Material No.CP2160) .
(5) Cap or cover all strut, piping, accessory openings and electrical connections.
(6) If necessary, as described in (Ref. AMM TASK 72-00-00-600-026), install desiccant bags and humidity indicator card in inlet and exhaust of the engine and monitor them during the preservation period.
(b) Attach the desicant bags with humidity indicator (Material No.CP2098) in inlet and exhausts of the engine. Make sure they are not in contact with the engine hardware.
(c) If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
(7) If necessary, seal inlet and exhausts of the engine with vapor barrier film (Material No.CP2160) .
(8) Put the adequate protective cover that follows:
(a) If the engine is stored off-wing, cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2782G01/G02). Make sure it is tight fitted to the engine.
(b) If the engine is stored on-wing, put a waterproof cover over the whole powerplant. Make sure it is tight fitted to the powerplant. If not possible, as an alternative, cover the entrance to fan inlet cowl and exit openings of exhaust nozzle and exhaust plug.
(c) If the engine inlet and exhaust covers are not available, use barrier material compliant with specification MIL-PRF-121, polyethylene film ASTM D2103 or equivalent 6 mil or thicker material, and tape ASTM D5486.
1 When you apply plastic sheeting and tape to the exhaust, make sure that the drain holes or tubes are clear and not covered.
2 When you use plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth and solvent (spec BMS11-9), to wipe the area where the tape is used.
b Cut an approximate inlet diameter circle from plastic sheet. Put tape on the plastic circle on FWD edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of tape with overlap around the perimeter of the inlet acoustic panel.
c Do not place plastic or tape over the lipskin or cover the lipskin with plastic.
d Apply the tape across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.
NOTE: The "one day before the scheduled preservation" procedure is to take advantage of the fact that the engine will be run again before the beginning of the preservation period. This avoids to do the ground idle run after the engine preparation. If the scheduled preservation starts the day after the last flight or engine run, no idle run is necessary during the engine preservation.
(1) Method 1 (oil drain)(a) Drain the oil tank (Ref. AMM TASK 12-13-79-610-003) and do the servicing of the oil tank with an approved mixture of engine oil (Material No.CP2442) and at least 5 percent of lubrication system corrosion preventive oil (Material No.CP5067) by volume (Ref. AMM TASK 12-13-79-610-002).
NOTE: In this case a minimum of 19l (5 US gal) of oil mixture is necessary for preservation motoring.
NOTE: It is not permitted to use corrosion protective additive (Material No.CP5075) for this procedure.
NOTE: In this case, it is not necessary to do the ground idle run.
(2) Method 2 (no oil drain)(a) Directly add the appropriate amount of corrosion preventative oil or corrosion inhibitor to the oil remaining in the tank.
If necessary, partially drain the oil tank before adding the additive to prevent over servicing.
In this case, add 1 quart of lubrication system corrosion preventive oil (Material No.CP5067) or 1.4 quarts of corrosion protective additive (Material No.CP5075) in the oil tank.
If necessary, complete the servicing with engine oil (Material No.CP2442) up to the full mark after adding the additive.
(3) After the last flight, make sure that the VBV doors are closed (Ref. AMM TASK 75-31-20-820-001).
(4) Cover the VBV grills with vapor barrier film (Material No.CP2160) .
(5) Cap or cover all strut, piping, accessory openings and electrical connections.
(6) If necessary, as described in (Ref. AMM TASK 72-00-00-600-026), install desiccant bags and humidity indicator card in inlet and exhaust of the engine and monitor them during the preservation period.
NOTE: The best condition for engine storage is to keep an environment with less than 70 percent of humidity. (Ref. AMM TASK 72-00-00-600-811) for desiccant bag inspection.
NOTE: desicant bags with humidity indicator (Material No.CP2098) must be inspected/replaced at regular intervals depending on weather conditions. Make sure they are accessible for inspection/replacement while disturbing a minimum amount of protective material. For inspection's instructions, do this task (Ref. AMM TASK 72-00-00-600-811)
(a) Mark the date on the humidity indicator tags. (b) Attach the desicant bags with humidity indicator (Material No.CP2098) in inlet and exhausts of the engine. Make sure they are not in contact with the engine hardware.
(c) If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
(7) If necessary, seal inlet and exhausts of the engine with vapor barrier film (Material No.CP2160) .
(8) Put the adequate protective cover that follows:
(a) If the engine is stored off-wing, cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2782G01/G02). Make sure it is tight fitted to the engine.
(b) If the engine is stored on-wing, put a waterproof cover over the whole powerplant. Make sure it is tight fitted to the powerplant. If not possible, as an alternative, cover the entrance to fan inlet cowl and exit openings of exhaust nozzle and exhaust plug.
(c) If the engine inlet and exhaust covers are not available, use barrier material compliant with specification MIL-PRF-121, polyethylene film ASTM D2103 or equivalent 6 mil or thicker material, and tape ASTM D5486.
1 When you apply plastic sheeting and tape to the exhaust, make sure that the drain holes or tubes are clear and not covered.
2 When you use plastic sheeting to cover the inlet, do the steps that follow:
a Use a lint-free cloth and solvent (spec BMS11-9), to wipe the area where the tape is used.
b Cut an approximate inlet diameter circle from plastic sheet. Put tape on the plastic circle on FWD edge of the acoustic panel behind the lipskin. Apply with at least 3 layers of tape with overlap around the perimeter of the inlet acoustic panel.
c Do not place plastic or tape over the lipskin or cover the lipskin with plastic.
d Apply the tape across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.
NOTE: For a period of up to 90 days, the preservation of the fuel system is not necessary.