(2)
Make sure that the LIGHT SW 11LJ is set to the OFF position.
(3)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(4)
Install the APU exhaust access-fairing (Ref. TASK 52-41-18-400-001).
(5)
Remove the access platform(s).
Subtask 49-81-42-865-052
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-81-42-860-057
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).
RING SEALING - REMOVAL/INSTALLATION
___________________________________
TASK 49-81-42-000-003
Removal of the Hot Nozzle and Bellows (131-9(A))
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 warning notice
No specific access platform 3.5 m (11 ft. 6 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 49-81-41-000-003 Removal of the Exhaust Muffler (131-9(A)) 49-81-41-400-003 Installation of the Exhaust Muffler (131-9(A)) 52-41-00-010-001 Open the APU Doors for Access 52-41-18-000-001 Removal of the APU Exhaust Access-Fairing 317AL 49-81-42-991-003 Fig. 401
R EFF : 001-049, 101-105, 107-107, 151-199, 49-81-42Page 401 201-210, Config-2 Aug 01/05
CES 3. Job Set-up
__________ Subtask 49-81-42-860-055
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 a warning notice in the cockpit to tell persons not to start the APU.
(4)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-81-42-865-056
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 49-81-42-010-052
C. Get Access
(1)
Put the access platform below the APU access doors 315AL and 316AR.
(2)
Open the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT SW 11LJ to the ON position.
(4)
Remove the APU exhaust access-fairing 317AL (Ref. TASK 52-41-18-000-001).
(5)
Remove the Exhaust Muffler (Ref. TASK 49-81-41-000-003)
R EFF : 001-049, 101-105, 107-107, 151-199, 49-81-42Page 402 201-210, Config-2 Aug 01/05
CES 4. Procedure
_________ Subtask 49-81-42-020-052
A. Removal of the Hot Nozzle and Bellows.
(Ref. Fig. 401/TASK 49-81-42-991-003)
(1)
Remove the clamp (2).
(2)
Remove the hot nozzle (1) from the exhaust muffler (5).
(3)
Remove the clamp (4) and the bellows (3).
(4)
Examine the piston ring (6) for damage or wear. If the piston ring is found to defective, replace the exhaust muffler (Ref. TASK 49-81-41-000-003) and (Ref. TASK 49-81-41-400-003).
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