1. Possible Causes
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- ENG/APU FIRE PNL (1WD)
- BOTTLE-APU FIRE EXTING (11WF)
- CARTRIDGE-APU FIRE EXTING BOTTLE (12WF)
- 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 26-22-00-710-001 Operational Test of the APU Fire-Extinguishing
Loop/Squib AMM 26-22-41-000-001 Removal of the Fire Extinguisher Bottle (11WF) AMM 26-22-41-400-001 Installation of the Fire Extinguisher Bottle (11WF) AMM 26-22-42-000-001 Removal of the Fire-Extinguisher Bottle Cartridge
(12WF) AMM 26-22-42-400-001 Installation of the Fire Extinguisher Bottle Cartridge (12WF) AMM 33-14-00-710-001 Operational Test of the Annunciator Light Test System in the Cockpit ASM 26-22/01
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.
May 01/05R CES
(2) Do the operational test of the APU fire-extinguishing system (Ref. AMM TASK 26-22-00-710-001).
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 the DISCH legend in the AGENT p/bsw does not come on during the test:
- 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).
(3) If the fault continues:
- replace the BOTTLE-APU FIRE EXTING (11WF) (Ref. AMM TASK 26-22-41-000-001) and (Ref. AMM TASK 26-22-41-400-001).
(4) If the fault continues:
- do a check and repair the wiring if necessary between the: PANEL (1WD) connector E/K and BOTTLE (11WF) connector A/C, BOTTLE (11WF) connector A/B and GND (Ref. ASM 26-22/01).
C. If the SQUIB legend in the AGENT p/bsw does not come on during the test:
- do the operational test of the annunciator-light test system (Ref. AMM
TASK 33-14-00-710-001). R
R (1) If the test gives a different maintenance message:
R - Do the trouble shooting procedure related to the maintenance
R message.
(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).
(3) If the fault continues:
- replace the CARTRIDGE-APU FIRE EXTING BOTTLE (12WF) (Ref. AMM TASK 26-22-42-000-001) and (Ref. AMM TASK 26-22-42-400-001).
「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 207
May 01/05 CES (4) If the fault continues:
- do a check and repair the wiring between the: CARTRIDGE (12WF) connector A/A and PANEL (1WD) connector E/G, CARTRIDGE (12WF) connector A/B and PANEL (1WD) connector F/J, CARTRIDGE (12WF) connector A and GND (Ref. ASM 26-22/01).
D. Do the test as given in the Para. 3.A.
5. Close-up
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本文链接地址：A320 Trouble Shooting Manual 排故手册 FIRE PROTECTION 防火(110)
