Preservation for a Period of up to 30 Days [CFMB]

TASK 72-00-00-600-006-A
Preservation for a Period of up to 30 Days

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	FORKLIFT 1000KG (2200 LB), LIFT ANGLE +10 TO -10 DEG
No specific	1	INDICATOR-HUMIDITY
856A2930	1	COVER FITTED BARE QEC ENGINE SHIPPING

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2098)	desicant bags with humidity indicator
(Material No.CP2160)	vapor barrier film

C. Referenced Information

REFERENCE	DESIGNATION
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 72-00-00-100-007-A	Engine Dry-out and Re lubrication
TASK 72-00-00-600-008-A	Preservation Renewal Requirements.
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 80-11-00-040-045-A	Manually Operate the Starter Valve

3. Job Set-up
Subtask 72-00-00-869-070-A ** ON A/C NOT FOR ALL

A. Not Applicable

4. Procedure
Subtask 72-00-00-620-057-A ** ON A/C NOT FOR ALL

A. Preservation for a Period of up to 30 days.

CAUTION: IF ENGINE WAS FERRIED OR SUBJECTED TO AN IN-FLIGHT SHUTDOWN (IFSD), ENGINE MUST BE "DRIED OUT" AND RELUBRICATED WITHIN 24 HOURS PER DRY-OUT PROCEDURE OF THIS SECTION.

CAUTION: UNDER NO CIRCUMSTANCES SHALL PRESERVATIVE OIL OR EQUIVALENT BE SPRAYED INTO THE ENGINE INLET, CORE COMPRESSOR OR TURBINE, OR ENGINE EXHAUST. DIRT PARTICLES DEPOSITED ON THE WETTED BLADES AND VANES MAY ADVERSELY AFFECT ENGINE PERFORMANCE DURING SUBSEQUENT OPERATION.

CAUTION: DO NOT USE THE HYDRAULIC PUMP WHEN IT IS EMPTY BECAUSE IMPORTANT DAMAGE TO THE PUMP CAN OCCUR.

(1) Operable Engine Preservation.
(a) On-wing installed engines.
1 Start the engines (Ref. AMM TASK 71-00-00-710-003) and let them become stable at ground idle for 15 to 20 minutes, followed by a thrust reverser cycle (Ref. AMM TASK 78-31-00-710-043) then stop the engines (Ref. AMM TASK 71-00-00-710-028).

NOTE: 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.

NOTE: You can ignore this step 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: In case of preservation with dry motoring instead of idle, number of renewal is affected (Ref. AMM TASK 72-00-00-600-008).

2 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.

3 If the engine is to be stored on-wing, put cover over entrance to fan inlet cowling and over exit openings of exhaust nozzle and exhaust plug.
4 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.
a When you apply plastic sheeting and tape to the exhaust, make sure that the drain holes or tubes are clear and not covered.
b When you use plastic sheeting to cover the inlet, do the steps that follow:

Use a lint-free cloth and solvent (spec BMS11-9), to wipe the area where the tape is used.
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.
Do not place plastic or tape over the lipskin or cover the lipskin with plastic.
Apply the tape across the diameter of the circular sheet to reduce the pillowing of the plastic sheeting.

5 If the engine is to be stored off-wing, protect the engine gas path as follows:
a Make sure that the Variable Bleed Valve (VBV) doors are closed (Ref. AMM TASK 75-31-20-820-001).
b Cover the VBV grills with vapor barrier film (Material No.CP2160) .
c Cap or cover all strut, piping, accessory openings and electrical connections.
d Put desicant bags with humidity indicator (Material No.CP2098) and INDICATOR-HUMIDITY in inlet and exhausts of the engine to protect it from moisture.

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.
If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.

e Seal the inlet and exhaust of the engine with vapor barrier film (Material No.CP2160) .
f Cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2930G01), (856A2930G02) or (856A2930G03) and attach tightly in place.
(b) Engines installed on stand.

CAUTION: OPERATION SHOULD BE CARRIED OUT IN A CONFINED SPACE WITH SUFFICIENT VENTILATION AND ON A FLAT HORIZONTAL SURFACE.

CAUTION: MAXIMUM TOWING SPEED IS 3MPH (5KM/H).

1 Tow the stand base (dolly) to an area with sufficient ventilation and a flat surface.
2 Carefully raise the stand base with a FORKLIFT 1000KG (2200 LB), LIFT ANGLE +10 TO -10 DEG.
3 Remove the pins, raise and stow the four caster wheels of stand base.
4 Lower the stand base to level surface, remove the FORKLIFT 1000KG (2200 LB), LIFT ANGLE +10 TO -10 DEG.
5 Attach the forward and aft caster wheels with pins.
6 Remove the 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2930G01), (856A2930G02) or (856A2930G03) from the engine.
7 Do the engine motoring procedure at max. 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 80-11-00-040-045).

8 Make sure that the VBV doors are closed (Ref. AMM TASK 75-31-20-820-001).
9 Cover the VBV grills with vapor barrier film (Material No.CP2160) .
10 Cap or cover all strut, piping, accessory openings and electrical connections.
11 Put desicant bags with humidity indicator (Material No.CP2098) and INDICATOR-HUMIDITY in inlet and exhausts of the engine to protect it from moisture as follows:
a 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.
b If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
12 Seal the inlet and exhaust of the engine with vapor barrier film (Material No.CP2160) .
13 Cover the full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2930G01), (856A2930G02) or (856A2930G03) and attach tightly in place.
14 Raise the stand base with a FORKLIFT 1000KG (2200 LB), LIFT ANGLE +10 TO -10 DEG.
15 Deploy, lower and pin the caster wheels of stand base.
16 Lower the stand base, remove the FORKLIFT 1000KG (2200 LB), LIFT ANGLE +10 TO -10 DEG.
17 Tow the stand base.

CAUTION: MAXIMUM TOWING SPEED IS 3MPH (5KM/H).

a Tow the stand base (dolly) with engine to storage area.
(2) Preservation - Non-operable Engines
(a) Dry out and re-lubricate the engine (Ref. AMM TASK 72-00-00-100-007) if engine was ferried or subjected to an IFSD.
(b) If engine is non-operable, consider the engine is preserved for 30 days from time of last operation.
(c) Make sure that VBV doors are closed (Ref. AMM TASK 75-31-20-820-001).
(d) Cover VBV grills with vapor barrier film (Material No.CP2160) .
(e) Cap or cover all strut, piping and accessory openings and electrical connections.
(f) Put desicant bags with humidity indicator (Material No.CP2098) and INDICATOR-HUMIDITY in inlet and exhausts of the engine to protect it from moisture as follows:
1 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.
2 If necessary, use vapor barrier film (Material No.CP2160) to locally protect the engine hardware.
(g) Seal inlet and exhaust of the engine with vapor barrier film (Material No.CP2160) .
(h) Cover full engine with 856A2930 COVER FITTED BARE QEC ENGINE SHIPPING (856A2930G01), (856A2930G02) or (856A2930G03), and attach tightly in place if in a trailer or stand. If on wing, cover entrance of fan cowling and exit opening of tailpipe and exhaust plug.
(i) 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.

[Rev.10 from 2021] 2026.04.01 02:40:30 UTC