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 1_ If the insulation resistance value is not correct:
 - replace the related fire detector:
 . for DET-FIRE, ENG 2 PYLON LOOP A (3WD2) and DET-FIRE, ENG2
 PYLON LOOP B (4WD2) (Ref. AMM TASK 26-12-16-000-001) and
 (Ref. AMM TASK 26-12-16-400-001),
 . for DET-FIRE, FAN LOOP A (4000WD1) and DET-FIRE, FAN LOOPB
 (4000WD2) (Ref. AMM TASK 26-12-15-000-042) and (Ref. AMM
 TASK 26-12-15-400-042),
 . for DET-FIRE, CORE LOOP A (4001WD1) and DET-FIRE, CORE
 LOOP B (4001WD2) (Ref. AMM TASK 26-12-17-000-041) and (Ref.
 AMM TASK 26-12-17-400-041).
 2_ If the insulation resistance value is correct:
 - do a check and repair the wiring of the FIRE DET I/P (LOOP
 A) and (LOOP B) from the engine 2 FDU (2WD2) to the three

 loop A and B fire detectors (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 232
 Feb 01/04R
 CES  Loss of the FIRE Warning Signal from the Engine 1 FDU (Loop A)

 

 1. Possible Causes
_______________
 - FDU-ENG1 (2WD1)

 - wiring of the FIRE LOOP A discrete from the engine 1 FDU 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 1 FIRE A WARN CKT:
 - 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:
 - do a check and repair the wiring of the FIRE LOOP A discrete from the engine 1 FDU 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 233
 Feb 01/04R CES

 

 Loss of the FIRE Warning Signal from the Engine 1 FDU (Loop B)
 1. Possible Causes
_______________
 - FDU-ENG1 (2WD1)

 - wiring of the FIRE LOOP B discrete from the engine 1 FDU 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 1 FIRE B WARN CKT:
 - 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:
 - do a check and repair the wiring of the FIRE LOOP B discrete from the engine 1 FDU 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 234
　
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