1. Possible Causes
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- ENG/APU FIRE PNL (1WD)
- FDU-APU (13WG)
- wiring
2. Job Set-up Information
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A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 26-12-12-000-001 Removal of the ENG/APU Fire Panel (1WD)
AMM 26-12-12-400-001 Installation of the ENG/APU Fire Panel (1WD)
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) AMM 26-22-00-710-001 Operational Test of the APU Fire-Extinguishing Loop/Squib AMM 33-14-00-710-001 Operational Test of the Annunciator Light Test System
in the Cockpit
ASM 26-13/01
ASM 26-22/02
3. Fault Confirmation
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A. The APU FIRE EXTINGUISHING PANEL 20VU (p/n 330TS08Y) has a fault. Special operation is necessary. Incorrect operation causes the APU fire extinguisher bottle to discharge. Airbus supplies a new 20VU panel that corrects this fault. See TFU 26.22.00.007 for more data.
(1) Maintenance recommendation:
(a) Before the test:
- Pull the CIRCUIT BREAKER 30WF on panel 120VU.
(b) During the test:
- Push the APU FIRE TEST BUTTON quickly and fully.
- Hold it fully during the test.
- Release it quickly.
(c) After the test:
- Close the CIRCUIT BREAKER 30WF on panel 120VU.
(2) Do the operational test of the APU fire-extinguishing system (Ref. AMM TASK 26-22-00-710-001).
「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 ∞∞26-22-00∞∞∞∞∞∞∞∞∞∞Page 203
May 01/05R CES
4. Fault Isolation
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R A. If the test gives a different maintenance message:
R - Do the trouble shooting procedure related to the maintenance message.
R
B. If during the test the upper red light row in the APU FIRE PUSH pushbutton switch does not comes on:
- do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001).
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:
- replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
(a) If the fault continues:
- replace the FDU-APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
(b) If the fault continues:
- do a check and repair the wiring if necessary between the: FDU (13WG) connector A/E and ANN (5LP) connector A/14, ANN (5LP) connector A/15 and CB (1WG), ANN (5LP) connector A/13 and PNL (1WD) connector E/B, (Ref. ASM 26-22/02) and (Ref. ASM 26-13/01)
C. If during the test the lower red light row in the APU FIRE PUSH pushbutton switch does not comes on:
- do the operational test of the annunciator light test system (Ref. AMM TASK 33-14-00-710-001).
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:
- replace the ENG/APU FIRE PNL (1WD) (Ref. AMM TASK 26-12-12-000-001) and (Ref. AMM TASK 26-12-12-400-001).
(a) If the fault continues:
- replace the FDU-APU (13WG) (Ref. AMM TASK 26-13-34-000-001) and (Ref. AMM TASK 26-13-34-400-001).
「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 ∞∞26-22-00∞∞∞∞∞∞∞∞∞∞Page 204
May 01/05 CES (b) If the fault continues:
- do a check and repair the wiring if necessary between the: FDU (13WG) connector B/E and ANN (2LP) connector A/38, ANN (2LP) connector A/39 and CB (1WG), ANN (2LP) connector A/37 and PNL (1WD) connector F/B, (Ref. ASM 26-22/02) and (Ref. ASM 26-13/01) 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(109)
