- connect the electrical connector 2WD1-B to the engine 1 FDU.
b If the insulation resistance value is correct:
_
- do a check and repair the wiring of the FIRE DET I/P (LOOP B) from the engine 1 FDU (2WD1) to the three loop 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 212
Aug 01/04R
CES Loss of the Detection by the Engine 2 Loop A
1. Possible Causes
_______________
- DET-FIRE, ENG 2 PYLON LOOP A (3WD2)
- FDU-ENG2 (2WD2)
- DET-FIRE, FAN LOOP A (4000WD1)
- DET-FIRE, CORE LOOP A (4001WD1)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 26-12-00-200-003 Visual Inspection of the Engine Fire Detection System
AMM 26-12-00-710-002 Operational Test of the Engine Fire and Overheat Detection with the Centralized Fault Display System (CFDS)
AMM 26-12-15-000-042 Removal of the Fan Fire Detectors (4000WD1,4000WD2) AMM 26-12-15-400-042 Installation of the Fan Fire Detectors (4000WD1,4000WD2) AMM 26-12-16-000-001 Removal of the Pylon Fire Detectors (3WD1,3WD2,4WD1,4WD2) AMM 26-12-16-400-001 Installation of the Pylon Fire Detectors
(3WD1,3WD2,4WD1,4WD2) AMM 26-12-17-000-041 Removal of the Core Fire Detectors (4001WD1,4001WD2) AMM 26-12-17-400-041 Installation of the Core Fire Detectors
(4001WD1,4001WD2) 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) R AMM 78-36-51-400-040 Installation of the Cowl Opening Actuator ASM 26-12/01
3. Fault Confirmation
__________________
NOTE : Some FIRE LOOP FAULT ECAM warnings occur in flight but do not occur
____ on the ground during tests. For such warnings, refer to SIL 26-029 for trouble shooting recommendations.
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).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-12-00∞∞∞∞∞∞∞∞∞∞Page 213
Aug 01/04 CES
4. Fault Isolation
_______________
A. If the test gives the maintenance message CHECK ENG 2 FIRE LOOP A:
- do a visual inspection of the three loop A fire detectors (Ref. AMM TASK 26-12-00-200-003).
(1) If one or more fire detector(s) is (are) damaged:
- replace it (them): . for DET-FIRE, ENG 2 PYLON LOOP A (3WD2) (Ref. AMM TASK 26-12-16-000-001) and (Ref. AMM TASK 26-12-16-400-001) . for DET-FIRE, FAN LOOP A (4000WD1) (Ref. AMM TASK 26-12-15-000-042) and (Ref. AMM TASK 26-12-15-400-042) . for DET-FIRE, CORE LOOP A (4001WD1) (Ref. AMM TASK 26-12-17-000-041) and (Ref. AMM TASK 26-12-17-400-041).
R (2) If there is no visual damage, do a visual inspection of the engine 2
R near the three fire detectors.
R Make sure that:
R (a) There is no fuel or hydraulic leakage.
R (b) There is no air leakage at the connections of the bleed air duct.
R (c) The electrical cables are correctly connected.
R (d) The bend in the flex hose is outboard and away from the engine
R (Ref. AMM TASK 78-36-51-400-040).
R (3) If there is no visual damage, do a visual inspection for retention or
R worn contact of each pin of the terminal block 450VT2. If necessary,
R replace the terminal block.
R (4) If there is no visual damage, swap the pins that follow:
- the pins B and D of the terminal block 450VT2 section 1
- with the pins D and A of the terminal block 450VT2 section 2.
(a) If the test gives the maintenance message CHECK ENG 1 FIRE LOOP B or the maintenance message CHECK ENG 1 FIRE LOOP A again:
- swap back the pins B and D of the terminal block 450VT2 section 1
- with the pins D and A of the terminal block 450VT2 section 2.
- do a check and if necessary, repair the wiring from the terminal block 450VT2 to the Fire Detection Unit (2WD2).
1 If the wiring is correct and if the fault continues, swap the
_
pins that follow:
- the pins of the terminal block 450VT2 section 1 of the engine 2 pylon loop A fire detector (3WD2) 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：A320 Trouble Shooting Manual 排故手册 FIRE PROTECTION 防火(31)
