(2)
 On the rear panel 120VU, close the panel which gives access to the AC power center 123VU.

 (3)
 Install the Third Occupant seat (Ref. TASK 25-11-41-400-001).

 (4)
 Remove the warning notice(s).

 (5)
 Close the access door 121AL.

 (6)
 Remove the access platform(s).

 CONTROL UNIT - GENERATOR (GCU) (1XS) - REMOVAL/INSTALLATION
___________________________________________________________ TASK 24-23-34-000-001 Removal of the GCU-APU (1XS) CAUTION : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT
_______ ELECTRICAL CIRCUITS. THERE IS A RISK OF DAMAGE TO EQUIPMENT DURING ITS REMOVAL/ INSTALLATION IF THE AC OR DC POWER STAYS CONNECTED.
 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 caps
 No specific circuit breaker(s) safety clip(s)
 No specific warning notices
 No specific access platform 1.6 m (5 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-23-34-991-001 Fig. 401
 3. Job Set-up
__________ Subtask 24-23-34-860-051
 A. Safety Precautions
 (1) In the cockpit, on the overhead panel 25VU and 35VU, make sure these pushbutton switches are released:
 -START,
 -APU GEN.
R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-23-34Page 401 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1

 (2) In the cockpit, put warning notices to tell persons not to operate the pushbutton switches on these overhead panels:
 -25VU (APU),
 -35VU (ELEC). Subtask 24-23-34-865-050
 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU ELEC/GEN1/OFF/BTC1 SPLY 5XU T28 122VU ELEC/APU/GCU 6XS Y25
 Subtask 24-23-34-010-050
 C. Get Access
 (1)
 Put an access platform at the access door 811 of the avionics compartment.

 (2)
 Open the access door 811.

 4. Procedure
_________ (Ref. Fig. 401/TASK 24-23-34-991-001) Subtask 24-23-34-020-050
 A. Removal of the GCU
 (1)
 Loosen the 2 knurled nuts (1).

 (2)
 Lower the 2 knurled nuts (1) to disengage the 2 studs (2).

 (3)
 Carefully pull the handle (3) of the GCU (4) until the GCU is disconnected from the rack receptacle (5).

 (4)
 Remove the GCU from the rack (6).

 (5)
 Put blanking caps on the rack receptacle (5) and the GCU connector.

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-23-34Page 402 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1

 APU Generator Control Unit (GCU)
 Figure 401/TASK 24-23-34-991-001

R 1EFF : 001-049, 051-099, 101-149, 151-199, 1 24-23-34Page 403 1201-299, 301-399, 1Aug 01/05 1 1 1CES 1 TASK 24-23-34-400-001

 Installation of the GCU-APU (1XS)
 CAUTION : MAKE SURE THAT NO AC OR DC POWER IS CONNECTED TO THE AIRCRAFT
_______ ELECTRICAL CIRCUITS. THERE IS A RISK OF DAMAGE TO EQUIPMENT DURING ITS REMOVAL/ INSTALLATION IF THE AC OR DC POWER STAYS CONNECTED.
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific warning notices
 No specific access platform 1.6 m (5 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-740-002 Operational Test of the Ground power Control Unit (GPCU) 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the APU 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
　
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