-
a fan shaft,
-seal,
-a Permanent Magnet Generator (PMG). The bearings of the fan are lubricated from the gearbox oil system. Two carbon seals are pressurized with air from the compressor to do the oil sealing. A permanent magnet generator (PMG), driven by the fan shaft, is mounted on the rear of the fan. The PMG supplies energy to the ECB when the main supply is defective. The PMG also provides back-up overspeed protection.
B. Compartment Cooling Valve (if installed) The compartment cooling valve is a pneumatic operated butterfly-valve. The valve has a pneumatic valve, a mechanical lever and a flap.
DUCT - OIL COOLER OUTLET - REMOVAL/INSTALLATION
_______________________________________________ R **ON A/C 001-003, 051-099, 401-499,
TASK 49-52-41-000-001 Removal of the Oil-Cooler Outlet-Duct (8052KM) (GTCP 36-300) 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 protective cover
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
49-52-41-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-52-41-860-053
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 the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
Subtask 49-52-41-865-050
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 49-52-41-010-050
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).
(3)
Set the LIGHT control switch to the ON position.
4. Procedure
_________
(Ref. Fig. 401/TASK 49-52-41-991-001) Subtask 49-52-41-020-050
A. Removal of the Oil-Cooler Outlet-Duct (8052KM)
(1)
Remove the nut (12), the bolt (13) and the washers (11) and (14).
(2)
Disconnect the bonding strap (15) from the structure.
(3)
Remove the clamp (1).
(4)
Remove the nuts (9), the bolts (6) and the washers (7) and (8).
(5)
Remove the oil-cooler outlet-duct assembly (8052KM) from the structure.
(6)
Put the protective cover on the oil cooler outlet.
(7)
Loosen the clamp (3).
(8)
Remove the bellow (2) from the pipe (4).
(9)
Open the clamps (5) and move the pipe (4) away from the support.
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