(3) Visual inspection of the oil cooler. WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
(a)
Blow excess water out of the cooler matrix with compressed air, use a maximum pressure of 2.0 bar (29.0075 psi)
(b)
Shine a light through the matrix and check that it is clean and free from contamination.
(c)
Repeat the cleaning procedure if required, do not exceed total immersion time of four hours.
NOTE : If cooler cannot be cleaned properly, return cooler to
____
workshop.
(4) Drying of the oil cooler. WARNING : USE A PROTECTIVE EYE SHIELD/GOGGLES WHEN YOU USE COMPRESSED
_______ AIR. DEBRIS AND/OR HIGH PRESSURE AIR CAN DAMAGE YOUR EYES.
WARNING : WEAR THERMAL INSULATED GLOVES WHEN HANDLING HEATED OR
_______
CHILLED PARTS TO PREVENT INJURY TO HANDS.
(a)
Remove as much water as possible from the cooler with the
compressed air.
(b)
Remove the blanking plugs from the oil inlet and outlet ports.
(c)
Put the cooler into an oven at the temperature of 121 deg.C
(249.80 deg.F) plus/minus 14 deg.C (57.20 deg.F)
(d)
Leave the cooler in the oven for a minimum of 2 hours or until the cooler is dry
(e)
Remove the cooler from the oven and while still hot, blow
compressed air through it to remove any trapped moisture.
(f)
Repeat the drying process until the cooler is completely dry.
(g)
Install the oil cooler (Ref. TASK 49-91-44-400-004)
R EFF : 001-049, 101-105, 107-107, 151-199, 49-91-44Page 705 201-210, Config-2 Aug 01/05
CES 5. Close-up
________ Subtask 49-91-44-410-059
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(3)
Set the LIGHT SW 11LJ to the OFF position.
(4)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(5)
Remove the access platform(s). Subtask 49-91-44-865-074
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
Subtask 49-91-44-860-066
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).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-91-44Page 706 201-210, Config-2 Aug 01/05
CES
COOLER - OIL ((APS 3200)) - CLEANING/PAINTING
_____________________________________________ TASK 49-91-44-100-002 Cleaning of the Oil Cooler (APS 3200) 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
__________________
Self Explanatory
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 clean, lint-free cloth No specific drip pan No specific pressurized container with control valve 25 l
(6.6042 USgal) No specific access platform 3.5 m (11 ft. 6 in.) No specific hose and adjustable spray nozzle 6 ft. (1.82 m)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 11-013A USA MIL-PRF-85704 TYPE II AQUEOUS CLEANING COMPOUND (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
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