(2)
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).
(3)
On the FUEL overhead panel 40VU, make sure that all L TK PUMPS and the 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 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
Subtask 28-22-00-010-052
C. 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.
4. Procedure_________
Subtask 28-22-00-710-053
A. Operational Test of the APU Fuel Pump
NOTE : You can feel with your hand when the APU fuel pump operates.
____
-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. On the APU section of the On the APU section of the overhead overhead panel 25VU: panel 25VU:
-push the APU MASTER SW - the ON legend in the APU MASTER SW pushbutton switch to the ON comes on. position.
At the APU Fuel Pump 4QC on the FR42/ZONE 140:
-the APU fuel pump operates.
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-------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
2. On the APU section of the overhead panel 25VU:
-release the APU MASTER SW pushbutton switch to the off position.
5. Close-up
________ Subtask 28-22-00-410-054
A. Close Access
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.
(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). Subtask 28-22-00-860-057
B. De-energize the aircraft electrical circuits
(Ref. TASK 24-41-00-862-002).
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Leak Test of the APU Fuel-Line Shroud
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 cap No specific ground air-pressure generator No specific pressure gages No specific pressure hoses No specific soap solution No specific valves
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
28-00-00-910-001 Fuel Safety Procedures 28-22-00-710-001 Operational Test of the APU Fuel-Pump System on
Ground to Purge the Fuel Line 32-12-00-010-001 Open the Main Gear Doors for Access 32-12-00-410-001 Close the Main Gear Doors after Access 28-22-00-991-001 Fig. 501
3. Job Set-up
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