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______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power AMM 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
 AMM 24-41-34-000-001 Removal of the Ground Power Control Unit (GPCU) (1XG) R AMM 24-41-34-000-001 Removal of the Ground Auxiliary Power Control Unit R (GAPCU) (24XG)
 AMM 24-41-34-400-001 Installation of the Ground Power Control Unit (GPCU)
 (1XG) R AMM 24-41-34-400-001 Installation of the Ground Auxiliary Power Control R Unit (GAPCU) (24XG)
 3. Fault Confirmation
__________________
 A. Test
 (1) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).
 NOTE : Energization of the aircraft is correct but, during the
____ procedure given at Para. 3.D, make sure that: - on the panel 108VU: the EXT PWR/NOT IN USE indicator light
 stays off and the EXT PWR/AVAIL caution light stays off - on the ELEC panel 35VU: the AVAIL legend of the EXT PWR pushbutton switch stays off.
 4. Fault Isolation
_______________
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 A. If the test confirms the fault:
 - replace the GPCU (1XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. AMM TASK 24-41-34-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞24-40-00∞∞∞∞∞∞∞∞∞∞Page 228
 Aug 01/05 CES

R  **ON A/C 401-499, 
R R R  A. If the test confirms the fault: - replace the GAPCU (24XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. AMM TASK 24-41-34-400-001). 
R  **ON A/C ALL
 B. Do this test to make sure that the system operates correctly:
 (1) Do the test given in Para. 3. and make sure that: - on the panel 108VU, the EXT PWR/NOT IN USE indicator light and EXT PWR/ AVAIL caution light come on. - on the ELEC panel 35VU, the AVAIL legend of the EXT PWR pushbutton switch comes on.
 (2) De-energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-862-002).

 

 AC EXTERNAL POWER CONTROL (GPCU OR GAPCU) - FAULT ISOLATION PROCEDURES
______________________________________________________________________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 TASK 24-41-00-810-801
 Failure of the Ground Power Control Unit

 1. Possible Causes
_______________
 - GPCU (1XG)
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 24-41-00-740-002 Operational Test of the Ground power Control Unit
 (GPCU) AMM 24-41-34-000-001 Removal of the Ground Power Control Unit (GPCU) (1XG) AMM 24-41-34-400-001 Installation of the Ground Power Control Unit (GPCU)
 (1XG)
 3. Fault Confirmation
__________________
 A. Test Do the operational test of the GPCU (Ref. AMM TASK 24-41-00-740-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message GPCU:
 - replace the GPCU (1XG) (Ref. AMM TASK 24-41-34-000-001) and (Ref. AMM TASK 24-41-34-400-001).
 B. Do the test given in Para. 3.A.

 TASK 24-41-00-810-802

 Failure of the Connection between the GPCU and the APU GCU
 1. Possible Causes
_______________
 - GPCU (1XG)

 - GCU-APU (1XS)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 24-23-34-000-001 Removal of the GCU-APU (1XS)
 AMM 24-23-34-400-001 Installation of the GCU-APU (1XS)
 AMM 24-41-00-740-002 Operational Test of the Ground power Control Unit

 (GPCU) AMM 24-41-34-000-001 Removal of the Ground Power Control Unit (GPCU) (1XG) AMM 24-41-34-400-001 Installation of the Ground Power Control Unit (GPCU)
 (1XG)
 ASM 24-41/02

 3. Fault Confirmation
__________________
 A. Test Do the operational test of the GPCU (Ref. AMM TASK 24-41-00-740-002).
　
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