R  B. If the BITE test gives the message TEST PASSED: 
R  (1) Do the trouble shooting for a delta current condition of the IDG 1 
R  (Ref. TASK 24-20-00-810-888). 
R  (2) If the fault continues: 
R  - do a check of the coil return wiring for a short circuit or a short 
R  to ground between pin B/5 of the BTC 1 and pin A/9A of the GCU 1 
R  (Ref. ASM 24-22/02). 
R  (a) If the wiring is not correct: 
R  - repair or replace as necessary. 
R  (b) If the wiring is correct: 
R  - do a check of the auxiliary contact for correct operation 
R  between pin B/29 and pin B/27 of the BTC 1 (Ref. ASM 24-22/02). 
R  1_  If there is no continuity:
R  - replace the BTC-1 (11XU1) (Ref. AMM TASK 24-22-55-000-001) 
R  and (Ref. AMM TASK 24-22-55-400-002). 
R  2_  If there is continuity:
R  - do a check of the wiring for an open circuit condition 
R  between pin B/29 of the BTC 1 and pin A/4C of the GCU 1 
R  (Ref. ASM 24-22/02). 
R  a_  If the wiring is not correct:
R  - repair or replace as necessary. 
R  b_  If the wiring is correct:
R  - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) 
R  and (Ref. AMM TASK 24-22-34-400-001). 
R  C. Do the test given in para. 3.

R TASK 24-20-00-810-861

R  Overcurrent of the GEN 2 Because of a Failure of the BTC 2 Control Circuit 
R  1. Possible Causes_______________ 
R  - GCU-2 (1XU2) 
R  - BTC-2 (11XU2) 
R  - wiring 
R  2. Job Set-up Information______________________ 
R  A. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE  DESIGNATION 
R  -------------------------------------------------------------------------------

R  24-20-00-810-889 
R 
R  AMM  24-22-34-000-001 
R  AMM  24-22-34-400-001 
R  AMM  24-22-55-000-001 
R  AMM  24-22-55-400-002 
R 
R  AMM  24-41-00-740-002 
R  ASM  24-22/03 

R 3. Fault Confirmation
__________________ R A. Test
Failure of an Opposite Channel of the Generator 2
Channel
Removal of the GCU-1(2) (1XU1, 1XU2)
Installation of the GCU-1(2) (1XU1, 1XU2)
Removal of the Contactors (9XU1, 9XU2, 11XU1, 11XU2)
Installation of the Contactors (9XU1, 9XU2, 11XU1,
11XU2)
Operational Check of GAPCU via CFDS

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 - do the trouble shooting given in Para 4.B. 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).

 「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 A246
 Aug 01/05 CES

R  B. If the BITE test gives the message TEST PASSED: 
R  (1) Do the trouble shooting for a delta current condition of the IDG 2 
R  (Ref. TASK 24-20-00-810-889). 
R  (2) If the fault continues: 
R  - do a check of the coil return wiring for a short circuit or a short 
R  to ground between pin B/5 of the BTC 2 and pin A/9A of the GCU 2 
R  (Ref. ASM 24-22/03). 
R  (a) If the wiring is not correct: 
R  - repair or replace as necessary. 
R  (b) If the wiring is correct: 
R  - do a check of the auxiliary contacts for correct operation 
R  between pin B/29 and pin B/27 of the BTC 2 (Ref. ASM 24-22/03). 
R  1_  If there is no continuity:
R  - replace the BTC-2 (11XU2) (Ref. AMM TASK 24-22-55-000-001) 
R  and (Ref. AMM TASK 24-22-55-400-002). 
R  2_  If there is continuity:
R  - do a check of the wiring for an open circuit condition 
　
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