(g)
Position clamp (7) and attach duct (6) to the fan (12).
(h)
TORQUE clamp (7) to between 15 and 21 lbf.in (0.16 and 0.23 m.daN).
(i)
Position clamp (4) on duct (5) and locate cooling duct (3) on the duct (5).
(j)
Secure the cooling duct (3) on the fan (12) with the bolts (9).
(k)
TORQUE the bolts (9) to 40 lbf.in (0.45 m.daN).
(l)
TORQUE the clamp (4) to between 10 and 16 lbf.in (0.11 and 0.18 m.daN).
(m)
Install the duct (1) with the clamps (2) and (10).
(n)
TORQUE the clamps (2) and (10)
(o)
Make sure that the electrical connectors are clean and in the correct condition.
(p)
Install the electrical connector (8). Subtask 49-52-53-865-052
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD
Subtask 49-52-53-710-050
C. Functional and Leak Test.
(1)
Do a functional test of the APU and make sure that the APU operates within the oil temperature limits (Ref. TASK 49-00-00-710-008).
(2)
Examine the cooling fan for oil leaks.
NOTE : No leaks are permitted.
____
________
5. Close-up
Subtask 49-52-53-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Set the LIGHT control switch 11LJ to the off position.
(3)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(4)
Remove the access platform(s).
(5)
Remove the warning notice(s). Subtask 49-52-53-860-051
B.
Aircraft Maintenance Configuration
(1) De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
VALVE - COMPARTMENT COOLING - REMOVAL/INSTALLATION
__________________________________________________
TASK 49-52-54-000-001
Removal of the Compartment Cooling Valve and Cooling Duct (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
__________________
This procedure is only applicable on APU's with a compartment cooling valve installed. These are APU's that have the Mod. 6 Dot mark on the modification plate intact.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
-------------------------------------------------------------------------------
No specific blanking plugs
No specific circuit breaker(s) safety clip(s)
No specific access platform 2.5 m (8 ft. 2 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 49-52-54-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-52-54-860-050
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 49-52-54-865-050
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 49-52-54-010-050
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, 316AR (Ref. TASK 52-41-00-010-001).
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