TASK 24-22-34-400-001
 Installation of the GCU-1(2) (1XU1, 1XU2)
 CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY THE AIRCRAFT WITH AC
_______
 AND DC POWER.
 YOU CAN CAUSE DAMAGE TO THE EQUIPMENT DURING ITS REMOVAL/
 INSTALLATION IF THE RELATED NETWORK IS NOT ISOLATED.

 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 notice
 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) R 24-41-00-740-002 Operational Check of GAPCU via CFDS 24-42-00-861-001 Energize the Ground Service Network from the External
 Power 31-60-00-860-001 EIS Start Procedure 31-60-00-860-002 EIS Stop Procedure 71-00-00-710-003 Engine Automatic Start 71-00-00-710-018 Discontinued Start, Restart and Shutdown Procedures 71-00-00-710-028 Engine Shutdown 71-00-00-710-043 Normal Engine Automatic Start Procedure
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 24-22-34-991-001 Fig. 401

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  **ON A/C 401-499, 
R R  24-22-34-991-001-A **ON A/C ALL Fig. 401A 
R  3. Job Set-up__________ **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
R  (Ref. Fig. 401/TASK 24-22-34-991-001) **ON A/C 401-499, 
R R  (Ref. Fig. 401A/TASK 24-22-34-991-001-A) **ON A/C ALL
 Subtask 24-22-34-860-051
 A. Aircraft Maintenance Configuration (1) Make sure that the ground service network is energized (Ref. TASK 24-42-00-861-001). (2) Make sure that the warning notice is in the cockpit to tell persons not to operate the pushbutton switches (ENG MASTER 1(2)) on the pylon panel 115VU (ENG panel).

 Subtask 24-22-34-865-054
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 1XU1
 122VU ELEC/GCU/1 2XU1 T26 FOR 1XU2
 122VU ELEC/GCU/2 2XU2 T27
 Subtask 24-22-34-010-053
 C. Get Access
 (1)
 Make sure that the access platform is in position at the access door

 811.

 (2)
 Make sure that the access door 811 is open.

 4. Procedure
_________ Subtask 24-22-34-420-050
 A. Installation of the GCU
 (1)
 Remove the blanking caps from the electrical connectors.

 (2)
 Make sure that the electrical connectors are clean and in the correct condition.

 (3)
 Clean the component interface and/or the adjacent area.

 (4)
 Do an inspection of the component interface and/or the adjacent area.

 (5)
 Put the GCU in position in the rack (6).

 (6)
 Carefully push the GCU until it is connected to the rack receptacle (5).

 (7)
 Lift the 2 knurled nuts (1) on the 2 studs (2).

 (8)
 Tighten the 2 knurled nuts (1).

 1EFF : ALL 1 24-22-34Page 408 1 1 Aug 01/05R 1 1 1CES 1

 Subtask 24-22-34-865-057
 B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): FOR 1XU1 2XU1 FOR 1XU2 2XU2 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 Subtask 24-22-34-710-050
 C. Do an operational test of the GPCU with the CFDS (Ref. TASK 24-41-00-740-002).
 NOTE : As an alternative procedure, do this operational test without the____ CFDS. 
R  **ON A/C 401-499, 
R  Subtask 24-22-34-710-050-A 
R R  C. Do an operational test of the GAPCU with the CFDS (Ref. TASK 24-41-00-740-002). 
R R  NOTE : As an alternative procedure, do this operational test without the____ CFDS.
 **ON A/C 001-049, 051-099, 101-105, 151-199, 201-228, 301-302,
 Subtask 24-22-34-710-051
　
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