(1)
Remove the lockwire from the upper and lower halves of the heat insulation (1) and (2), remove the heat insulation halves.
(2)
Remove the clamp (3) from the exhaust hot nozzle assy. and APU exhaust duct.
(3)
Loosen the nut of the muffler drain-line and disconnect the drain line.
(4)
Remove the APU exhaust access-fairing 317AL (Ref. TASK 52-41-18-000-001).
(5)
Remove the cotter pins, the castle-nuts, the bolts, the washers and the bushing from the exhaust muffler.
(6)
Pull the exhaust muffler rearwards to get an sufficient clearence between the APU duct and the muffler duct.
Exhaust System - Visual Inspection Area
Figure 601/TASK 49-81-00-991-002
CES
(7)
Pull the hot nozzle and bellows assy (7) in FWD direction. Subtask 49-81-00-210-054
B.
Visual Inspection
(1)
Examine the V-clamp for distortion, cracks, thread damage or heat discoloration. Replace if defective (Ref. AIPC 49810401090).
(2)
Examine the exhaust duct (portion inside the APU compartment) for damage, cracks and discoloration. If the exhaust duct is found to be defective replace the exhaust muffler (Ref. TASK 49-81-41-000-002) and (Ref. TASK 49-81-41-400-002).
(3)
Examine the inner and outer areas of the hot nozzle assembly for distortion, wear and damage. Replace if defective (Ref. AIPC 49814101010).
(4)
Inspect the insulation blankets (1) and (2) for cracks and missing material. Replace the insulation halves if found defective insulation bracket (1) and/or insulation bracket (2).
(5)
Use a hand mirror and examine as far as possible, the piston ring for distortion, wear and damage. If the piston ring is defective replace the exhaust muffler (Ref. TASK 49-81-41-000-002) and (Ref. TASK 49-81-41-400-002).
5. Close-up
________ Subtask 49-81-00-420-053
A. Assemble for Close Access
(1)
Push the exhaust muffler forward on the guide rails.
(2)
Attach the exhaust muffler with the bolts, the bushing, the washers and the castle-nuts.
(3)
TORQUE the castle-nuts to between 1.95 and 2.2 m.daN (14.38 and 16.22 lbf.ft).
(4)
Install the cotter pins (Ref. AIPC 49810401080).
(5)
Install the APU exhaust access fairing 317AL (Ref. TASK 52-41-18-400-001).
(6)
Push the hot nozzle/bellows assembly forward until the hot nozzle flange touches the APU exhaust duct flange.
(7)
Adjust the hot nozzle flange radially to the APU exhaust duct flange. The radial offset should be 0 +4 -4 mm (0.0 +0.16 -0.16 in.).
(8)
Position the clamp (3) on the exhaust coupling flanges with the lockbolts in the 3 and 9 o'clock position.
(9)
Secure the V-clamp (3). Torque the clamp lockbolts - of the basic V-clamp to between 0.81 and 0.93 m.daN (71.68 and
82.30 lbf.in);
or - of the AEROQUIP V-clamp to between 0.31 and 0.34 m.daN (27.43 and
30.08 lbf.in).
(10)
Install the heat insulation upper (1) and lower (2) halves, connect the two halves with MISCELLANEOUS (Material No. 19-010).
(11)
Connect the two halves with corrosion-resistant steel lockwire 0.8mm (0.032in.) to the hot nozzle assembly studs.
(12)
Connect the drain line with the nut to the power-plant drain system. Subtask 49-81-00-410-053
B.
Close Access
(1)
Set the LIGHT control switch 11LJ to the off position.
(2)
Make sure that the work area is clean and clear of tool(s) and other items.
(3)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s). Subtask 49-81-00-865-057
C.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
TASK 49-81-00-200-005
Visual Check of the Sealing-Ring Coupling Bellows (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
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