R 4. Procedure
_________
R (Ref. Fig. 402/TASK 24-41-34-991-003)
R Subtask 24-41-34-020-051
R A. Removal of the GAPCU
R (1) Loosen the nuts (1).
R (2) Lower the nuts (1).
R (3) Pull the GAPCU (4) on its rack (6) to disconnect the electrical
R connectors (5).
R (4) Remove the GAPCU from its rack (6).
R (5) Put blanking caps on the disconnected electrical connectors.
R Ground Auxiliary Power Control Unit (GAPCU) R Figure 402/TASK 24-41-34-991-003
1EFF : 401-499, 1 24-41-34Page 412 1 1 Aug 01/05 1 1 1CES 1
R TASK 24-41-34-400-001-A
R Installation of the Ground Auxiliary Power Control Unit (GAPCU) (24XG)
R CAUTION : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT_______
R ELECTRICAL CIRCUITS.
R THERE IS A RISK OF DAMAGE TO EQUIPMENT DURING ITS REMOVAL/
R INSTALLATION IF THE AC OR DC POWER STAYS CONNECTED.
R 1. Reason for the Job__________________
R Self Explanatory
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 No specific warning notice(s)
R No specific access platform 0.5 m (1 ft. 8 in.)
R No specific access platform 1.6 m (5 ft. 3 in.)
R B. Referenced Information
R -------------------------------------------------------------------------------
R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R 24-41-00-740-002 Operational Check of GAPCU via CFDS
R 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the
R External Power
R 24-41-34-991-003 Fig. 402
R 3. Job Set-up__________
R Subtask 24-41-34-860-051
R A. Aircraft Maintenance Configuration
R (1) Make sure that the access platform is in position at the access door
R 811.
R (2) Make sure that the access door 811 is open.
R (3) Make sure that the access platform is in position at the access door
R 121AL.
R (4) Make sure that the access door 121AL is open.
R (5) Make sure that the external power connector is not connected to the
R aircraft external power receptacle.
R (6) Make sure that a warning notice is in position on the access door
R 121AL to tell persons not to use the external power receptacle.
R (7) In the cockpit, on the overhead ELEC panel 35VU, make sure that these
R pushbutton switches are released:
R - BAT 1, BAT 2,
R - APU GEN,
R - GEN 1, GEN 2,
R - EXT PWR.
R (8) In the cockpit, make sure that warning notice(s) is (are) in position
R to tell persons not to operate the pushbutton switches on these
R overhead panels:
R - 21VU (EMER ELEC PWR),
R - 35VU (ELEC).
R (9) In the cockpit, on the APU section of the overhead panel 25VU, make
R sure that a warning notice is in position to tell persons not to
R start the APU.
R Subtask 24-41-34-865-060
R B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and
R tagged
R -------------------------------------------------------------------------------
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