(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).
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(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).
(5)
On the FUEL overhead panel 40VU, make sure that the X FEED pushbutton switch is released (the ON legend is off).
Subtask 28-22-00-010-051
B. Get Access
(1)
Open the LH main landing-gear (MLG) door (Ref. TASK 32-12-00-010-001).
(2)
Put the stepladder in position at the LH MLG door.
Subtask 28-22-00-865-052
C. 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
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4. Procedure
_________ Subtask 28-22-00-710-051
A. Operational Test of the APU Fuel-Pump System
NOTE : You can feel with your hand when the APU fuel pump operates.
____
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the APU section of the overhead panel 25VU:
-push the APU MASTER SW pushbutton switch to the ON position.
2. On the FUEL overhead panel 40VU:
-push the L TK PUMPS 1
pushbutton switch.
3. On the FUEL overhead panel 40VU:
-release the L TK PUMPS 1 pushbutton switch.
4. On the APU section of the overhead panel 25VU:
-release the APU MASTER SW pushbutton switch to the off position.
On the APU section of the overheadpanel 25VU:
-
the ON legend in the APU MASTER SWcomes on.
At the APU Fuel Pump 4QC on the FR42/ZONE 140:
-
the APU fuel pump operates.
On the FUEL overhead panel 40VU:
-
the OFF legend in the L TK PUMPS 1pushbutton switch goes off.
At the APU Fuel Pump 4QC on the FR42/ZONE 140:
-
the APU fuel pump stops.
On the FUEL overhead panel 40VU:
-
the OFF legend in the L TK PUMPS 1pushbutton switch comes on.
At the APU Fuel Pump 4QC on the FR42/ZONE 140:
-
the APU fuel pump operates.
On the APU section of the overheadpanel 25VU:
-
the ON legend in the APU MASTER SWgoes off.
At the APU Fuel Pump 4QC on the FR42/ZONE 140:
-
the APU fuel pump stops.
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5. Close-up
________ Subtask 28-22-00-860-055
A. Put the aircraft back to its initial configuration.
(1)
On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(2)
De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
(3) Put the system back to the serviceable condition. Subtask 28-22-00-410-053
B. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Remove the stepladder from the LH MLG door.
(3)
Close the LH MLG door. (Ref. TASK 32-12-00-410-001)
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TASK 28-22-00-710-006 Operational Test of the APU Fuel Pump
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific stepladder 2.0 m (6 ft. 7 in.)
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