(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 49-81-41-865-050
 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 49-81-41-010-050
 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).

 4. Procedure
_________
 (Ref. Fig. 401/TASK 49-81-41-991-001) Subtask 49-81-41-020-050
 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, located forward of the bellow clamps and remove the two halves of the insulation blanket.

 (3)
 Remove the V-clamp (15) from the APU exhaust flange (16).

 (4)
 Remove and discard the cotter pins (2) from the castle nuts (3 and 5).

 (5)
 Remove the castle nut (5), the washer (6), the bolt (8) and the washer (9).

 (6)
 Remove the castle nut (3), the washer (4), the bushing (11) and the bolt (12).

 (7)
 Pull the exhaust muffler (7) from the guide rails (10).

 (8)
 Make an inspection of the flexible seal (1) for damage or chafing. NOTE : Replace the seal if necessary.

____

 (9)
 Make an inspection of the thermal insulation segments for damage. NOTE : Replace the insulation if necessary.

____
 5. Close-up
________

 Exhaust Muffler
 Figure 401/TASK 49-81-41-991-001

 CES  TASK 49-81-41-400-001

 Installation of the Exhaust Muffler (GTCP 36-300)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific access platform 3.5 m (11 ft. 6 in.) No specific Torque Wrench : range 0.00 to 1.20 m.daN
 (0.00
 to 9.00 lbf.ft) No specific Torque Wrench : range 0.20 to 3.60 m.daN

 (2.00 to 26.00 lbf.ft)

 B.
 Consumable Materials

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 05-027 USA MIL-L-81309
 RUST INHIBITOR(FOR CORROSION USE 15-004)
 (Ref. 20-31-00) Material No. 19-010 USA AMS 5687
 LOCKWIRE STAINLESS STEEL ANNEALED 0.8MM DIA
 (Ref. 20-31-00)
 C. Expendable Parts
 -------------------------------------------------------------------------------FIG.ITEM |DESIGNATION |IPC-CSN -------------------------------------------------------------------------------
cotter pins 49-81-04 01 -080

 D. 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 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
 the Ground Connector 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 52-41-18-400-001 Installation of the APU Exhaust Access-Fairing 317AL 49-81-41-991-001 Fig. 401
　
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