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 49-00-00-710-008 Operational Test of the APU (APS 3200) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 52-41-21-000-001 Removal of the APU Access Door 315AL 52-41-22-000-001 Removal of the APU Access Door 316AR and the related
Door Mechanism
3. Job Set-up
__________
Subtask 49-00-00-860-111
A. Aircraft Maintenance Configuration
(1)
Put the warning notices on panel 25VU to tell persons not to start the APU.
(2)
Energize the ground service network (Ref. TASK 24-41-00-861-002).
(3)
Make sure that the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
Subtask 49-00-00-865-122
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-00-00-010-075
C. Get Access
(1)
Put the access platform below the access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL, 316AR. (Ref. TASK 52-41-00-010-001)
(3)
Set the light switch 11LJ to on.
(4)
Remove the APU access doors 315AL, 316AR (Ref. TASK 52-41-21-000-001) (Ref. TASK 52-41-22-000-001).
4. Procedure
_________
WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE
_______
MATERIAL/S.
USE PROTECTIVE CLOTHING, RUBBER GLOVES AND GOGGLES.
CAUTION : DO NOT POINT THE SPRAY INTO THE APU INTAKE-DUCT.
_______
WATER CAN GO INTO THE FELT METAL AND FREEZE. THIS WILL CAUSE
DAMAGE TO THE INTAKE DUCT AND MAKE IT UNSERVICEABLE.
Subtask 49-00-00-160-051
A. Cleaning of the APU Compartment
(1)
Take a container and use a solution of 50% water and 50% CLEANING AGENTS (Material No. 11-011).
(2)
Apply the solution with a sponge on the APU compartment walls.
(3)
Leave the solution on the surface for 20 minutes.
(4)
Rinse the surface with warm clear water.
(5)
Start and operate the APU (Ref. TASK 49-00-00-710-008) for 10 minutes.
Subtask 49-00-00-160-054
B. Alternative
(1)
Vaporize the solution (50% water and 50% CLEANING AGENTS (Material No. 11-011)) with low pressure on the compartment wall. Take care not to get spray on the APU.
(2)
Leave the solution on the surface for 20 minutes.
(3)
Rinse the surface with hot steam water cleaner (temperature 70 DEG.C
(158.00 DEG.F) lowest pressure.
(4)
Start and operate the APU (Ref. TASK 49-00-00-710-008) for 10 minutes.
5. Close-up
________ Subtask 49-00-00-410-079
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the light switch 11LJ to off.
(3)
Close the APU access doors 316AR, 315AL (Ref. TASK 52-41-00-410-001) .
(4)
Remove the access platform(s). Subtask 49-00-00-865-125
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
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