(2)
Close the APU access door 315AL (Ref. TASK 52-41-00-410-001).
(3)
Set the light SW 11LJ to the OFF positon.
(4)
Remove the access platform(s). Subtask 49-20-00-865-061
F.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
TASK 49-20-00-200-002
Inspection/Check of the Engine Compressor Rotor and Turbine Nozzle (GTCP 36-300)
WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
WARNING : DISCONNECT THE LOW TENSION ELECTRICAL SUPPLY 5 MINUTES BEFORE YOU
_______ START WORK ON THE IGNITION SYSTEM. ALSO, GROUND THE IGNITER LEAD WITH AN INSULATED DEVICE AS YOU DISCONNECT IT FROM THE IGNITER PLUG. HIGH CURRENT AND VOLTAGE, WHICH ARE USED IN THE IGNITION SYSTEM, CAN KILL YOU.
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific borescope 6/8/mm
No specific circuit breaker(s) safety clip(s)
No specific light source, Olympus 1LK-2
No specific socket spanner 0.3125 in. (7.9374 mm)
No specific access platform 4.0 m (13 ft. 1 in.)
98D49207534000 1 GUIDE TOOL - BORESCOPE, APU
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 49-00-00-860-003 APU Start by External Power (GTCP 36-300) 49-00-00-860-004 APU Shutdown by External Power (GTCP 36-300) -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-41-41-000-001 Removal of the Igniter Plug (8031KM) (GTCP 36-300) 49-41-41-400-001 Installation of the Igniter Plug (8031KM) (GTCP
36-300) 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 49-20-00-991-001 Fig. 601
3. Job Set-up
__________ Subtask 49-20-00-860-075
A. Aircraft Maintenance Configuration
(1)
Energize the ground service network
(Ref. TASK 24-42-00-861-001).
(2)
On the panel 25VU, make sure that the APU MASTER SW p/bsw is OFF.
(3)
Put the warning notices on panel 25VU to tell persons not to start the APU.
(4)
Make sure that the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
Subtask 49-20-00-865-062
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 49-20-00-010-056
C. Get Access
(1)
Put the access platform in position below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001).
(3)
Make sure that the light SW 11LJ is set to the ON position.
4. Procedure_________ (Ref. Fig. 601/TASK 49-20-00-991-001) NOTE : You should communicate with the local Garrett Field Service
____
Representative, if you are not sure of any unusual wear or
deterioration that is apparent during the borescope inspection.
Subtask 49-20-00-290-058
A. Borescope Inspection of the Power Compressor Section
(1)
Remove the access cover plate on the compressor air inlet duct.
(2)
Assemble the borescope 6/8/mm to the light source, Olympus 1LK-2.
(3)
Before you do a borescope inspection of the parts of the engine that turn, you must remove the cover plate from the starter motor (8KA). This will allow access to the starter motor shaft. Do these steps:
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