(Ref. Fig. 501/TASK 28-22-00-991-001)
(1)
Read the pressure gages 1 and 2 and make sure that the APU fuel-line shroud and the supply line from the ground air-pressure generator are free of air pressure.
(2)
Disconnect the test assembly from the drain line (2) and remove it.
(3)
Remove the blanking cap from the union (6).
(4)
Make sure that the union (6) and the nut (7) are clean and in correct condition.
(5)
Connect the nut (7) to the union (6). NOTE : Hold the union (6) with a second wrench.
____
(6)
Put the clamps (1) and (3) in position and install the washer (4) and the bolt (5).
(7)
Remove the ground support and maintenance equipment, the special and standard tools and all other items.
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B. Put the aircraft back to its initial configuration.
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the RH main gear door (Ref. TASK 32-12-00-410-001).
(3)
Remove the warning notices.
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TASK 28-22-00-790-002 Leak Test of the APU Fuel Line
1. Reason for the Job
__________________
Leak test of the APU fuel line with left tank pump running after
disconnection of the APU fuel pump system.
2. Job Set-up Information
______________________
A. 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 31-60-00-860-001 EIS Start Procedure
3. Job Set-up
__________ Subtask 28-22-00-860-060
A. Aircraft Maintenance Configuration
(1)
Energize the aircraft electrical circuits
(Ref. TASK 24-41-00-861-002).
(2)
Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. TASK 31-60-00-860-001).
(3)
On the APU section of the overhead panel 25VU, make sure that the APU MASTER SW is in the off position (the ON legend is off).
(4)
On the FUEL overhead panel 40VU, make sure that all L TK PUMPS and R TK PUMPS pushbutton switches are released (the OFF legends are on).
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B. Make sure that this(these) circuit breaker(s) is(are) closed:
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU FUEL/X FEED/VALVE/MOT1 2QE A12 49VU APU/FUEL/BLOW OFF/PUMP 2QC B14 121VU APU/FUEL/BLOW OFF/CTL 1QC K39 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41 121VU APU/FUEL/LP VALVE/CTL 1QF M40 121VU APU/FUEL/LP VALVE/SPLY 2QF M39 121VU APU/FUEL/PUMP/CTL 3QC M38 121VU FUEL/X FEED/VALVE/MOT2 1QE M24
R 121VU FUEL/L WING TK/PUMP2 SPLY 7QA N26 121VU FUEL/L WING TK/PUMP1 SPLY 1QA N23 121VU FUEL/R WING TK/PUMP2 SPLY 8QA Q26 121VU FUEL/R WING TK/PUMP1 SPLY 2QA Q23
4. Procedure
_________
Subtask 28-22-00-790-051
A. Leak Test of the APU Fuel Line
(1)
On the FUEL overhead panel 40VU, push the L TK PUMPS 1 pushbutton switch (the OFF legend goes off).
(2)
On the APU section of the overhead panel 25VU, push the APU MASTER SW to the on position (the ON legend comes on).
(3)
On the ECAM control panel, push the FUEL pushbutton switch and make sure that on the lower ECAM display unit the APU fuel valve symbol is in the vertical position (valve open).
(4)
Make sure that no fuel comes out of the drain mast at the FR47 and/or the APU compartment drain mast.
NOTE : If the APU fuel line was disconnected, make sure that there
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