(4)
Remove the filter element (3) from the fuel filter housing (4). Discard the element (3) and the packing (2).
(5)
Tip the residual fuel from the housing into the container.
(6)
Remove and discard packing (1).
(7)
Put a blanking cap on the FCU fuel filter orifice. Subtask 49-32-41-420-053
B.
Filter Preperation
(1)
Examine the fuel filter housing (4) for damage.
(2)
Lubricate the new packing (2) and packing (1) with FUELS (Material No. 01-002) or FUELS (Material No. 01-003).
(3)
Install the new packing (4) on the new filter element (3).
(4)
Install the new packing (1) in the filter orifice of the fuel control unit.
(5)
Locate the new filter element (3) on the filter port of the fuel control unit.
(6)
Install the fuel filter housing (4) on the fuel control unit. NOTE : The filter housing (4) should be turned clockwise until it is
____
hand tight.
Fuel Filter Element
Figure 201/TASK 49-32-41-991-004
CES Subtask 49-32-41-865-060
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1QC, 2QC, 3QC, 1KD, 2KD, 1QF, 2QF.
Subtask 49-32-41-870-050
D. Purge the air from the APU fuel line (Ref. TASK 28-22-00-710-001). NOTE : When the fuel from the drain hose flows out free of air, release
____
the fuel vent pushbutton.
Subtask 49-32-41-790-051
E. Leak Test
(1)
Clean and dry the fuel control unit and the filter housing with lint free cloth.
(2)
Start the APU (Ref. TASK 49-00-00-860-005).
(3)
Examine the fuel control unit and the filter housing for leaks. NOTE : No leaks are permitted.
____
(4)
Stop the APU (Ref. TASK 49-00-00-860-006).
5. Close-up
________ Subtask 49-32-41-410-054
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(3)
Remove the access platform(s).
(4)
Remove the warning notice(s).
Subtask 49-32-41-860-055
B. Aircraft Maintenance Configuration.
(1) De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
VALVE - DRAIN, COMBUSTION CHAMBER - REMOVAL/INSTALLATION
________________________________________________________ TASK 49-32-51-000-001 Removal of the Combustion Chamber Drain Valve (APS 3200) WARNING : DO NOT TOUCH THE APU UNTIL IT IS SUFFICIENTLY COOL TO PREVENT BURNS
_______ WHEN YOU DO THE MAINTENANCE TASK(S).
WARNING : OBEY THE FUEL SAFETY PROCEDURES.
_______
1.
Reason for the Job
__________________
Self Explanatory
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.)
No specific container 4 l (1.0566 USgal)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures 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 49-32-51-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-32-51-941-050
A. Safety Precautions
(1)
Obey the fuel safety procedures (Ref. TASK 28-00-00-910-001).
(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 ground fire extinguishing equipment is available.
(5)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-00-00-864-001).
Subtask 49-32-51-865-050
B. Open, safety and tag this(these) circuit breaker(s):
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