- replace the related fire detector: . for DET-FIRE, ENG 1 PYLON LOOP A (3WD1) or DET-FIRE, ENG 1 PYLON LOOP B (4WD1) (Ref. AMM TASK 26-12-16-000-001) and (Ref. AMM TASK 26-12-16-400-001),
「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 225
Feb 01/04R CES
. for DET-FIRE, FAN LOOP A (4000WD1) or DET-FIRE, FAN LOOP B (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) or DET-FIRE, CORE LOOP B (4001WD2) (Ref. AMM TASK 26-12-17-000-041) and (Ref. AMM TASK 26-12-17-400-041).
- connect the electrical connector to the engine 1 FDU.
b If the resistance value is correct:
_
- do a check and repair the wiring of the FIRE DET I/P from the engine 1 FDU (2WD1) to the three loop fire detectors (Ref. ASM 26-12/01).
(b) For the loop with the correct resistance value:
- disconnect the electrical harness from the three fire detectors
- on the responder of each detector, make sure that the insulation resistance value is higher than 20 Megohms: . between pins A and the responder metal casing and between pin D and the responder metal casing for the engine 1 pylon A fire detector (3WD1) or engine 1 pylon B fire detector (4WD1), fan loop A fire detector (4000WD1) or fan loop B fire detector (4000WD2). . between pin A and and the responder metal casing and between pin C and the responder metal casing for the core loop A fire detector (4001WD1) or fan loop B fire detector (4001WD2).
1 If the insulation resistance value is not correct:
_
- replace the related fire detector: . for DET-FIRE, ENG 1 PYLON LOOP A (3WD1) or DET-FIRE, ENG 1 PYLON LOOP B (4WD1) (Ref. AMM TASK 26-12-16-000-001) and (Ref. AMM TASK 26-12-16-400-001), . for DET-FIRE, FAN LOOP A (4000WD1) or DET-FIRE, FAN LOOP B (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) or 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 from the engine 1 FDU (2WD1) to the three loop fire detectors (Ref. ASM 26-12/01).
(3) If the equivalent resistance values are correct on the loops A and B:
- replace the FDU-ENG1 (2WD1) (Ref. AMM TASK 26-12-34-000-001) and (Ref. AMM TASK 26-12-34-400-001).
(a) If the fault continues:
- disconnect the electrical harness from the three loop A and B fire detectors
- on the responder of each detector, make sure that the insulation resistance value is higher than 20 Megohms:
「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 226
Feb 01/04R CES
. between pins A and the responder metal casing and between pin D and the responder metal casing for the engine 1 pylon A fire detector (3WD1), engine 1 pylon B fire detector (4WD1), fan loop A fire detector (4000WD1) and fan loop B fire detector (4000WD2). . between pin A and and the responder metal casing and between pin C and the responder metal casing for the core loop A fire detector (4001WD1) and fan loop B fire detector (4001WD2).
1_ If the insulation resistance value is not correct:
- replace the related fire detector:
. for DET-FIRE, ENG 1 PYLON LOOP A (3WD1) and DET-FIRE, ENG1
PYLON LOOP B (4WD1) (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 1 FDU (2WD1) 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 227
Feb 01/04R
CES Loss of the Detection by the Engine 2 Loop A and Loop B
