(a)
If the relative humidity is less than 40 percent no further maintenance action is required until the next check.
(b)
If the relative humidity is more than 40 percent do a check of the condition of the APU:
-
if corrosion is found return the APU to a maintenance facility.
-
if no corrosion is found put the APU back in storage. Use procedures in para. 4. B. steps (1) to (12).
Subtask 49-20-00-550-056
C. De-preservation of the APU
(1)
Make sure that the APU generator is correctly attached (Ref. TASK 24-23-51-400-001).
(2)
Make sure that the oil level is correct (Ref. TASK 49-90-00-600-007).
(3)
Do a check of the oil filter elements for contamination, replace if necessary (Ref. TASK 49-91-41-200-002).
(4)
Do a check of the fuel filter element, replace if necessary (Ref. TASK 49-32-41-920-001).
(5)
Purge the APU fuel line (Ref. TASK 28-22-00-710-001).
(6)
Do the operational test of the APU (Ref. TASK 49-00-00-710-010). Run the APU for at least five minutes.
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CES
(7)
Do check of the APU and the APU connections for fuel, oil and air leaks during operation.
(8)
Do the check of the oil level again (Ref. TASK 49-90-00-600-007).
(9)
Return the APU to normal operation.
5. Close-up
________ Subtask 49-20-00-410-068
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT SW 11LJ to the OFF position.
(3)
Close access doors 315AL and 316AR (Ref. TASK 52-41-00-410-001)
(4)
Remove the access platform. Subtask 49-20-00-865-084
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-20-00-860-074
C. Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(2)
De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
(3)
Remove the warning notice(s).
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ENGINE ((APS 3200)) - SERVICING
_______________________________ TASK 49-20-00-600-002 Preservation/Storage/Return to Service of APU (APS 3200) WARNING : MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT
_______ AVAILABLE.
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
1. Reason for the Job
__________________
The preservation procedure of the APU is carried out to prevent internal and
external corrosion and deterioration when the APU is not in service.
The preservation procedure will give the maximum protection and must be
carried out in clean and dry conditions.
Storage times and procedures are given in Table 301.
NOTE : Find more MATERIALS in PARA 4. A. (1) (a), (2) (a) 2_ and (14) (a).
____
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s)
No specific access platform 2.5 m (8 ft. 2 in.)
No specific 2 CONTAINER 10 L(2 1/2 USGAL)
No specific 1 WARNING NOTICE
No specific 1 TIE WRAP
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 03-003 USA MIL-PRF-7808
LUBRICATING OIL TURBINE SYNTHETIC BASE
(Ref. 20-31-00) Material No. 11-002 USA MIL-PRF-680
DRY CLEANING SOLVENT (VARSOL/WHITE SPIRIT)
(Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002
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