Loss of the FIRE Warning Signal from the Engine 2 FDU Loop A
 1. Possible Causes
_______________
 - FDU-ENG2 (2WD2)

 - wiring of the FIRE LOOP A discrete from the engine 2 FDU (2WD2) to the first terminal block

 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) 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 FIRE A WARN CKT:
 - 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:
 - do a check and repair the wiring of the FIRE LOOP A discrete from the engine 2 FDU (2WD2) to the first terminal block (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 235
 Feb 01/04R CES

 Loss of the FIRE Warning Signal from the Engine 2 FDU Loop B
 1. Possible Causes
_______________
 - FDU-ENG2 (2WD2)

 - wiring of the FIRE LOOP B discrete from the engine 2 FDU (2WD2) to the first terminal block

 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) 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 FIRE B WARN CKT:
 - 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:
 - do a check and repair the wiring of the FIRE LOOP B discrete from the engine 2 FDU (2WD2) to the first terminal block (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 236
 Feb 01/04R CES

 Loss of the First and Third Rows of the Legend of the ENG 1 FIRE Pushbutton Switch
 1. Possible Causes
_______________
 - BOARD-ANN LT TEST & INTFC (5LP)

 - ENG/APU FIRE PNL (1WD)

 - wiring of the annunciator light test and interface board (5LP)

 - wiring of the ENG/APU fire panel (1WD)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 26-12-00-710-001 Operational Check of Loop/Squib
 AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD)
 AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD)
 AMM 33-14-33-000-001 Removal of the Annunciator-Light Test and

 Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) AMM 33-14-33-400-001 Installation of the Annunciator-Light Test and Interface-Board (1LP, 2LP, 3LP, 4LP, 5LP, 6LP, 7LP, R 8LP, 9LP, 10LP, 11LP, 12LP, 18LP, 19LP, 20LP) ASM 26-12/01
　
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