B. If the test gives the maintenance message CHECK FDU APU LGCIU INTFC:
- do the BITE test of the landing gear (Ref. AMM TASK 32-69-00-740-001).
R (1) If the test gives a different maintenance message:
R - Do the trouble shooting procedure related to the maintenance
R message.
R
(2) If the fault continues:
- do a check and repair the wiring if necessary between the: FDU (13WG) connector A/D and LGCIU 1 (5GA1) connector AB/2B, FDU (13WG) connector B/D and LGCIU 2 (5GA2) connector AB/2B.
C. Do the test as given in the Para. 3.A.
5. Close-up
________
A. Put the aircraft back to its initial configuration.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-13-00∞∞∞∞∞∞∞∞∞∞Page 210
May 01/05 CES Loss of the INOP LOOP A discrete from the APU FDU
1. Possible Causes
_______________
- FDU-APU (13WG)
- wiring
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 26-13-00-710-001 Operational Test of the APU Fire and Overheat
Detection System AMM 26-13-15-710-051 AMM 26-13-34-000-001 Removal of the APU Fire-Detection Unit (FDU) (13WG) AMM 26-13-34-400-001 Installation of the APU Fire-Detection Unit (FDU)
(13WG) ASM 26-13/01 R AWM 31-52-18
3. Fault Confirmation
__________________
A. The APU FIRE DETECTION UNIT 13WG (p/n 3720-00-00) gives unwanted "CHECK FDU APU LOOP A WARN CKT" and/or "CHECK FDU APU LOOP B WARN CKT" warning(s).
- The warnings do not relate to a failure of the loops A or B.
- The messages show during aircraft electrical power up at the power up test or the CFDIU test.
- The FDU gives the messages during each flight until the aircraft
operation is fully stopped. Airbus supplies a new FDU that corrects R this fault. For more information refer TFU 26.13.00.001.
(1) To prevent the FDU to give messages on power up:
(a) When the Electric Ground Supply energizes the aircraft:
- Do not operate switches in this order: MAINT BUS -> "ON", BAT 1+2 -> "ON" and EXT PWR -> "ON"
- Operate switches in this order: MAINT BUS -> "ON", EXT PWR -> "ON" and BAT 1+2 -> "ON".
(b) When the APU energizes the aircraft:
- Do the 'Operational Test of the APU Fire and Overheat Detection with the CFDS' after the APU starts (Ref. AMM TASK 26-13-15-710-051).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-13-00∞∞∞∞∞∞∞∞∞∞Page 211
May 01/05 CES
- If FWC and FDU are connected and all other systems operate satisfactorily, the unwanted message(s) clear(s). No maintenance work is necessary.
- If FWC and FDU are not connected or another system has a failure, the message stays. Maintenance work is necessary.
B. Do the operational test of the APU fire and overheat detection system (Ref. AMM TASK 26-13-00-710-001).
4. Fault Isolation
_______________
A. If the test gives the maintenance message CHECK FDU APU LOOP A WARN CKT:
- replace the FDU-APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
(1) If the fault continues:
- do a check and repair of the wiring between
FDU 13WG-A/M and the first terminal block
(Ref. ASM 26-13/01) and (Ref. AWM 31-52-18).
B. Do the test as given in the Para. 3.A.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞26-13-00∞∞∞∞∞∞∞∞∞∞Page 212
May 01/05R
CES Loss of the INOP LOOP B discrete from the APU FDU
1. Possible Causes
_______________
- FDU-APU (13WG)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FIRE PROTECTION 防火(68)
