(8)
Pull the exhaust muffler (7) from the guide rails (10).
Exhaust Muffler
Figure 401/TASK 49-81-41-991-002
CES TASK 49-81-41-400-002
Installation 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 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 -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits 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 52-41-18-400-001 Installation of the APU Exhaust Access-Fairing 317AL 49-81-41-991-002 Fig. 401
3. Job Set-up
__________
Subtask 49-81-41-860-051
A. Aircraft Maintenance Configuration
(1)
Make sure that the aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(2)
On the panel 25VU make sure that the APU MASTER SW pushbutton switch is off.
(3)
Make sure that there is 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).
(5)
Make sure that the access platform is in position below the APU compartment.
(6)
Make sure that the APU access doors are open (Ref. TASK 52-41-00-010-001).
(7)
Make sure that the LIGHT control switch 11LJ is set to the on position.
Subtask 49-81-41-865-054
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
(Ref. Fig. 401/TASK 49-81-41-991-002) Subtask 49-81-41-420-051
A. Installation of the Exhaust Muffler
(1)
Make an inspection of the flexible seal (1) for damage or chafing. Replace the seal if necessary.
(2)
Make an inspection of the thermal insulation segments for damage. Replace the insulation if necessary.
(3)
Make sure that the parts retained from the removed component are clean and in the correct condition.
(4)
Clean the component interface and/or the adjacent area.
(5)
Put the exhaust muffler (7) on the guide rails (10) and put the flexible seal (1) into the guide sleeve (17).
(6)
Connect the hot nozzle (18) to the APU exhaust flange (16) with the V-clamp (15).
(7)
TORQUE the V-clamp (15) to between 0.81 and 0.93 m.daN (71.68 and
82.30 lbf.in).
(8)
Install the two halves of the insulation blanket, located forward of the bellow clamps and safety the stud fasteners with MISCELLANEOUS (Material No. 19-010).
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