- 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 207
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
_______________
R A. If the test gives a different maintenance message:
R - Do the trouble shooting procedure related to the maintenance message.
R
B. If the test gives the maintenance message CHECK FDU APU LOOP A/B NO DATA FROM FDU APU
- do a check for 28 VDC power supply to the FDU-APU (13WG) connector A/A (Ref. ASM 26-13/01).
(1) If there is no 28 VDC:
- do a check and repair the wiring if necessary between the: FDU (13WG) connector A/A and CB (1WG), FDU (13WG) connector B/N and GND, FDU (13WG) connector B/B and GND, FDU (13WG) connector A/B and GND (Ref. ASM 26-13/01).
(2) If there is approx. 28 VDC:
- replace the FDU APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
C. If the test gives the maintenance message:
CHECK FDU APU SUPPLY
and/or
POWER SUPPLY INTERRUPT
- do a check for 28 VDC power supply to the FDU-APU (13WG) connector B/A (Ref. ASM 26-13/01).
(1) If there is no 28 VDC:
- do a check and repair the wiring if necessary between the: FDU (13WG) connector B/A and CB (2WG), FDU (13WG) connector B/N and GND, FDU (13WG) connector B/B and GND, FDU (13WG) connector A/B and GND (Ref. ASM 26-13/01).
(2) If there is approx. 28 VDC:
- replace the FDU APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
D. 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 208
May 01/05 CES
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 209
May 01/05R
CES LGCIU Signal Mismatch
1. Possible Causes
_______________
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 32-69-00-740-001 BITE Check Landing Gear Control Interface Unit (LGCIU) using MCDU to Ensure that Continuous BITE is Operative 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(67)
