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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 B. If the BITE test gives the message TEST PASSED:
R - do an electrical resistance test of the IDG 1 disconnect solenoid for
R an open circuit or a high resistance condition between pin A/12 and pin
R A/13 of the IDG 1 (3 ohms plus or minus 1 ohm) (Ref. ASM 24-21/01).
R (1) If the resistance values are out of the specified limits:
R - replace the engine 1 IDG (4000XU) (Ref. AMM TASK 24-21-51-000-040)
R and (Ref. AMM TASK 24-21-51-400-040).
R (2) If the resistance values are in the specified limits:
R - replace the RELAY-IDG 1 DISC CTL (3XT)
R - do a dynamic disconnect test of the IDG 1 (Ref. AMM TASK 24-21-00-R 720-041).
R (a) If the test is OK:
R - stop the trouble shooting.
R (b) If the test is not OK:
R - do a check of the wiring for an open circuit or a short to
R ground between pin A1 of the IDG 1 disconnect control relay
R (3XT) and pin A/12 of the IDG 1 (Ref. ASM 24-21/01).
R 1_ If the wiring is not correct:
R - repair or replace as necessary.
R 2_ 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 a_ If the fault continues:
R - replace the engine 1 IDG (4000XU) (Ref. AMM TASK 24-21-R 51-000-040) and (Ref. AMM TASK 24-21-51-400-040).
R C. Do the test given in para. 3.
「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, ∞∞24-21-00∞∞∞∞∞∞∞∞∞∞Page 247
Aug 01/05 CESR TASK 24-21-00-810-821 R Failure of the Disconnect Solenoid System of the IDG 2 R 1. Possible Causes
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R - GCU-2 (1XU2)
R - IDG (4000XU)
R - RELAY-IDG 2 DISC CTL (4XT)
R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-21-00-720-041 R R AMM 24-21-51-000-040 R R AMM 24-21-51-400-040 R R AMM 24-22-34-000-001 R AMM 24-22-34-400-001 R AMM 24-41-00-740-002 R ASM 24-21/01
R 3. Fault Confirmation
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R A. Test Operational Test of the IDG Disconnect and Reconnect (Reset) Function - Engine in Operation Removal of the Integrated Drive Generator -IDG 1(2),(4000XU) Installation of the Integrated Drive Generator -IDG 1(2),(4000XU) Removal of the GCU-1(2) (1XU1, 1XU2) Installation of the GCU-1(2) (1XU1, 1XU2) Operational Check of GAPCU via CFDS
R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R NOTE : Do the trouble shooting for all the other CFDS messages
____ R related to the IDG 2 that come into view with the message IDG2 R (E2-4000XU)/ RELAY (4XT)/GCU2 (1XU2).
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.
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