R 4. Procedure
_________
R Subtask 26-22-00-710-072
R A. Operational Test of the Test Circuit
R WARNING : MAKE SURE THAT YOU WILL NOT CAUSE UNWANTED CHANGES TO OTHER
_______ R SYSTEMS BEFORE YOU PUSH THE APU FIRE PUSHBUTTON SWITCH. WHEN R YOU PUSH THE APU FIRE PUSHBUTTON SWITCH, THESE VALVES CLOSE : R - LP FUEL SHUTOFF VALVE (APU) R - FUEL SOLENOID VALVE (APU) R - BLEED AIR VALVE (APU)
R
R -------------------------------------------------------------------------------R ACTION RESULT R -------------------------------------------------------------------------------
R 1. In the APU section of the ENG/APU
R panel 25 VU:
R - push and hold the TEST
R pushbutton switch.
R
R
R
R 2. In the APU section of the ENG/APU
R panel 25 VU:
R - release the TEST pushbutton
R switch.
R 5. Close-up
________
R Subtask 26-22-00-410-064 In the APU section of the ENG/APU panel 25 VU:
-the SQUIB legend in the AGENT SQUIB pushbutton switch comes on.
NOTE : If the SQUIB legend comes on,
____ SQUIB A and SQUIB B operate correctly.
In the APU section of the ENG/APU panel 25 VU:
-the SQUIB legend in the AGENT SQUIB pushbutton switch goes off.
R A. Put the aircraft back to its initial configuration.
R (1) Remove the warning notice from the panel 25 VU.
R Subtask 26-22-00-860-065
R B. Put the aircraft back to its initial configuration.
R (1) De-energize the aircraft electrical circuits
R (Ref. TASK 24-41-00-862-002).
R TASK 26-22-00-040-009
R To make sure that the APU Automatic Fire Extinguishing System is operative when
R the APU AUTO EXTING TEST is inoperative
R 1. Reason for the Job__________________
R Refer to the MMEL TASK: 26-22-10
R APU Fire Extinguishing
R APU Auto Exting Test
R 2. Job Set-up Information______________________
R A. Fixtures, Tools, Test and Support Equipment
R -------------------------------------------------------------------------------
R REFERENCE QTY DESIGNATION
R -------------------------------------------------------------------------------
R No specific warning notice
R B. Referenced Information
R -------------------------------------------------------------------------------
R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
R from the External Power
R 3. Job Set-up__________
R Subtask 26-22-00-941-062
R A. Put the warning notice in position on the overhead panel 25VU to tell
R persons not to operate the APU.
R 4. Procedure_________
R Subtask 26-22-00-710-073
R A. Operational Test of the Test Circuit
R -------------------------------------------------------------------------------
R ACTION RESULT
R -------------------------------------------------------------------------------
R 1. In the APU section of the
R overhead panel 25 VU:
R - put the APU MASTER switch in
R the ON position.
R In the APU/AUTO EXTING section
R of panel 50 VU:
R - push the TEST ON pushbutton
R during the test.
R NOTE : If the APU operates, it
____ R stops. R
R 2. In the APU/AUTO EXTING section of R panel 50 VU: R - push the RESET pushbutton R switch
R 5. Close-up
________
R Subtask 26-22-00-860-067 In the APU/AUTO EXTING section of panel 50 VU:
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