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NOTE : Engines cannot be preserved and placed into storage and then
____ forgotten. A viable plan (as disciplined as for an engine in revenue service) must be defined and then implemented.
When desiccants are used they must be changed on a regular basis, determined by the environmental conditions, to keep the desiccant effective. It is recommended that the variable bleed valves (VBV) must be closed when the engine is to be preserved and stored or when maintenance is being performed in this area. This will avoid the possibility of foreign objects entering the core engine inlet through the VBV's. For the closure of the VBV doors (Ref. TASK 75-31-20-820-001).
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TASK 72-00-00-600-006
Preservation for a Period up to 30 Days.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific forklift
No specific start cart
856A2930 1 COVER - FITTED BARE QEC'D ENGINE SHIPPING
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP2098 USA MIL-D-3464
desiccant bags (Ref. 70-30-00)
Material No. CP2160 USA MIL-LP-378
vapor barrier film (Ref. 70-30-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-00-00-710-003 Engine Automatic Start 71-00-00-710-028 Engine Shutdown 72-00-00-100-007 Engine Dry-out and Relubrication 75-31-20-820-001 Set the Variable Bleed Valve Assembly to the Closed
position 78-31-00-710-042 Operational Test of the Thrust Reverser System R 80-11-00-040-045 Manually Operate the Starter Valve
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3. Job Set-up
__________ Subtask 72-00-00-869-070
A. Not Applicable
4. Procedure
_________ Subtask 72-00-00-620-057
A. Preservation for a Period 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.
(1) Operable Engine Preservation.
(a) On-wing installed engines. 1 Start the engines (Ref. 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. TASK 78-31-00-710-042) and stop the engines (Ref. TASK 71-00-00-710-028).
NOTE : You can ignore this step if it was done during the last
____ engine operation (flight cycle). Under these conditions, consider the engine preserved for 30 days from time of last operation.
2 Cover entrance to fan cowling and exit openings.
_
(b) Engines installed on stand. CAUTION : OPERATION SHOULD BE CARRIED OUT IN A CONFINED SPACE
_______ WITH ADEQUATE VENTILATION AND ON A FLAT HORIZONTAL SURFACE.
CAUTION : MAXIMUM TOWING SPEED IS 3MPH (5KM/H).
_______
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E E Feb 01/98 E E ECES E F 『 E C F M E E E E 56-5B E E E 1 Tow stand base (dolly), to an area with adequate ventilation
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and a flat surface.
2 Carefully raise stand base with a forklift.
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3 Unpin, raise and stow the four caster wheels of stand base.
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4 Lower stand base to level surface, clear forklift.
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5 Secure forward and aft caster wheels with pins.
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6 Remove COVER - FITTED BARE QEC'D ENGINE SHIPPING (856A2930G01)
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