(4)
Set the LIGHT SW 11LJ to the OFF position.
(5)
Remove the access platform(s). Subtask 49-81-41-865-058
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 49-81-41-860-057
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).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-81-41Page 408 201-210, Config-2 Aug 01/05
CES
(3) Remove the warning notice(s).
R EFF : 001-049, 101-105, 107-107, 151-199, 49-81-41Page 409 201-210, Config-2 Aug 01/05
CES
MUFFLER - EXHAUST - REMOVAL/INSTALLATION
________________________________________ TASK 49-81-41-000-002 Removal of the Exhaust Muffler (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 access platform 3.5 m (11 ft. 6 in.)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 52-41-00-010-001 Open the APU Doors for Access 52-41-18-000-001 Removal of the APU Exhaust Access-Fairing 317AL 49-81-41-991-002 Fig. 401
3. Job Set-up
__________ Subtask 49-81-41-860-050
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU make sure that the APU MASTER SW pushbutton switch 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 49-81-41-865-053
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 49-81-41-010-051
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 and 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the LIGHT control switch 11LJ to the on position.
(4)
Remove the APU exhaust access-fairing (Ref. TASK 52-41-18-000-001).
4. Procedure
_________
(Ref. Fig. 401/TASK 49-81-41-991-002) Subtask 49-81-41-020-051
A. Removal of the Exhaust Muffler
(1)
Loosen the nut (14) and disconnect the drain line (13). WARNING : CUT, REMOVE AND DISCARD THE LOCKWIRE AS YOU DO THE TASK.
_______
LOOSE LOCKWIRE CAN CUT OR BLIND YOU.
(2)
Remove and discard the lockwire from the stud fasteners of the insulation blanket forward of the bellow clamps.
(3)
Remove the two halves of the insulation blanket.
(4)
Remove the V-clamp (15) from the APU exhaust flange (16).
(5)
Remove and discard the cotter pins (2) from the castle nuts (3) and (5).
(6)
Remove the castle nut (5), the washer (6), the bolt (8) and the washer (9).
(7)
Remove the castle nut (3), the washer (4), the bushing (11) and the bolt (12).
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