3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the engine fire and overheat detection from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 26-12-00-710-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK FDU ENG 1 LGCIU INTFC:
 - replace the FDU-ENG1 (2WD1) (Ref. AMM TASK 26-12-34-000-001) and (Ref. AMM TASK 26-12-34-400-001).
 (1) If the fault continues:
 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 251
 Feb 01/04R CES

 (2) If the fault continues:
 - do a check of the wiring of the FLT/GND discrete from the engine 1 FDU (2WD1) to the LGCIU 1 (5GA1) (Ref. ASM 26-12/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - replace the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 1_ If the fault continues:
 - do a check and repair the wiring of the FLT/GND discrete
 from the engine 1 FDU (2WD1) to the LGCIU 2 (5GA2) (Ref. ASM

 26-12/01).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 252
 Feb 01/04R
 CES  Loss of the FLT/GND Discrete from the Engine 2 FDU

 1. Possible Causes
_______________
 - FDU-ENG2 (2WD2)

 - LGCIU-2 (5GA2)

 - LGCIU-1 (5GA1)

 - wiring of the FLT/GND discrete from the engine 2 FDU (2WD2) to the LGCIU 2 (5GA2)

 - wiring of the FLT/GND discrete from the engine 2 FDU (2WD2) to the LGCIU 1 (5GA1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 26-12-00-710-002  Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)
 AMM 26-12-34-000-001 Removal of the Engine Fire-Detection Unit (FDU) (2WD1,2WD2) AMM 26-12-34-400-001 Installation of the Engine Fire-Detection Unit (FDU)
 (2WD1,2WD2)
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 ASM 26-12/01

 3. Fault Confirmation
__________________
 A. Test
 (1) Do the operational test of the engine fire and overheat detection from the Multipurpose Control and Display Unit (MCDU) (Ref. AMM TASK 26-12-00-710-002).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message CHECK FDU ENG 2 LGCIU INTFC:
 - replace the FDU-ENG2 (2WD2) (Ref. AMM TASK 26-12-34-000-001) and (Ref. AMM TASK 26-12-34-400-001).
 (1) If the fault continues:
 - replace the LGCIU-2 (5GA2) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 253
 Feb 01/04R CES

 (2) If the fault continues:
 - do a check of the wiring of the FLT/GND discrete from the engine 2 FDU (2WD2) to the LGCIU 2 (5GA2) (Ref. ASM 26-12/01).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001).
 1_ If the fault continues:
 - do a check and repair the wiring of the FLT/GND discrete
 from the engine 2 FDU (2WD2) to the LGCIU 1 (5GA1) (Ref. ASM

 26-12/01).
 B. Do the test given in Para. 3.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 254
 Feb 01/04R
 CES  Loss of the Power Supply of the Engine 1 FDU (Loop A)
　
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