R (a) If the fault continues:
R - replace the engine 2 IDG (4000XU) (Ref. AMM TASK 24-21-51-000-R 040) and (Ref. AMM TASK 24-21-51-400-040).

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A265
 Aug 01/05 CES

R  (2) If the maintenance message GCU2 (1XU2) comes into view associated 
R  with other fault codes: 
R  - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and (Ref. 
R  AMM TASK 24-22-34-400-001). 
R  B. Do the test given in para. 3.

R TASK 24-20-00-810-870

R  Failure of the Generator Control Unit 1 
R  1. Possible Causes_______________ 
R  - GCU-1 (1XU1) 
R  - wiring 
R  2. Job Set-up Information______________________ 
R  A. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE  DESIGNATION 
R  -------------------------------------------------------------------------------

R  AMM 24-22-34-000-001  Removal of the GCU-1(2) (1XU1, 1XU2) 
R  AMM 24-22-34-400-001  Installation of the GCU-1(2) (1XU1, 1XU2) 
R  AMM 24-41-00-740-002  Operational Check of GAPCU via CFDS 
R  ASM 24-22/02 
R  3. Fault Confirmation__________________ 
R  A. Test 

R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R (a) If the BITE test gives the message TEST FAILED: R - do the trouble shooting given in Para 4.A.
R (b) If the BITE test gives the message TEST PASSED: R - stop the trouble shooting.
R 4. Fault Isolation
_______________
R A. If the BITE test gives the message TEST FAILED:
R - push the line key adjacent to the TEST FAILED message.

R (1) If the maintenance message GCU1 (1XU1) comes into view:
R - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref.
R AMM TASK 24-22-34-400-001).

R (2) If the fault continues:
R - do a check and repair the wiring between the GCU 1 and the GLC 1
R auxiliary control relay (4XU1) (Ref. ASM 24-22/02) for a short to
R 28VDC between:

R . pin B/10J of the GCU 1 and pin A/C3 of the ELEC/GEN 1 pushbutton R switch (3XU1)

R . pin A/C1 of the ELEC/GEN 1 pushbutton switch and pin A/A of the R function relay (20XU)

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A267
 Aug 01/05 CESR . pin A/1 of the function relay and pin A/X1 of the GLC 1 auxiliary R control relay.

R B. Do the test given in para. 3.

R TASK 24-20-00-810-871 R Failure of the Generator Control Unit 2 R 1. Possible Causes
_______________
R - GCU-2 (1XU2) R - wiring R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R  AMM  24-22-34-000-001  Removal of the GCU-1(2) (1XU1, 1XU2) 
R  AMM  24-22-34-400-001  Installation of the GCU-1(2) (1XU1, 1XU2) 
R  AMM  24-41-00-740-002  Operational Check of GAPCU via CFDS 
R  ASM  24-22/03 
R  3. Fault Confirmation__________________ 
R  A. Test 

R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R (a) If the BITE test gives the message TEST FAILED: R - do the trouble shooting given in Para 4.A.
R (b) If the BITE test gives the message TEST PASSED: R - stop the trouble shooting.
R 4. Fault Isolation
_______________
R A. If the BITE test gives the message TEST FAILED:
R - push the line key adjacent to the TEST FAILED message.

R (1) If the maintenance message GCU2 (1XU2) comes into view:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and (Ref.
R AMM TASK 24-22-34-400-001).

R (2) If the fault continues:
R - do a check and repair the wiring between the GCU 2 and the GLC 2
R auxiliary control relay (4XU2) (Ref. ASM 24-22/03) for a short to
R 28VDC between:

R . pin B/10J of the GCU 2 and pin A/C3 of the ELEC/GEN 2 pushbutton R switch (3XU2)

R . pin A/C1 of the ELEC/GEN 2 pushbutton switch and pin A/X1 of the R GLC 2 auxiliary control relay.
　
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