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 B. If the BITE test gives the message TEST PASSED:
R - do a check of the contact of the ENG/APU FIRE panel (1WD) for a correct
R operation between pin A/b and pin A/c (Ref. ASM 24-22/02).
R (1) If the contact does not operate correctly:
R - replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001)
R and (Ref. AMM TASK 26-12-12-400-001).
R (2) If the contact operates correctly:
R - do a check of the wiring for an open circuit or a short to ground
R between pin A/c of the ENG/APU FIRE panel and pin A/3J 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 ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-
R 001) and (Ref. AMM TASK 26-12-12-400-001).
R C. Do the test given in para. 3.
R TASK 24-20-00-810-867
R Failure of the ENG/APU FIRE Panel or its Wiring to the GCU 2
R 1. Possible Causes_______________
R - GCU-2 (1XU2)
R - ENG/APU FIRE PNL (1WD)
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 AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD)
R AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD)
R ASM 24-22/03
R 3. Fault Confirmation__________________
R A. Test
R - do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R NOTE : It is not necessary to do the trouble shooting for the CFDS
____ R message ENG2 FIRE PB SW (1WD)/ GCU2 (1XU2) if the flight or R maintenance log books show that the flight crew or the maintenance R personnel pushed the ENG 2 FIRE pushbutton switch on the ENG/APU R FIRE panel after an engine-fire condition or to do a test of the R engine fire loop. R To remove this CFDS message at the start of the subsequent flight, R release and push the ELEC/GEN 2 pushbutton switch (2XU2) before R the subsequent engine start sequence. R If the flight or maintenance crew did not push the ENG 2 FIRE R pushbutton switch, the trip was accidental and you must do the R trouble shooting procedure that follows:
R (1) If the BITE test gives the message TEST FAILED: R - do the trouble shooting given in Para 4.A.
R (2) If the BITE test gives the message TEST PASSED: R - do the trouble shooting given in Para 4.B.
「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 A261
Aug 01/05 CES
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 B. If the BITE test gives the message TEST PASSED:
R - do a check of the contact of the ENG/APU FIRE panel (1WD) for a correct
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