TASK 49-00-00-810-848
APU EMER SHUT DOWN - EMERGENCY (GTCP 36-300)
1. Possible Causes
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- water ingress in panel 108VU
- ECB (59KD)
- FIRE EMERG-STOP RELAY (5WF)
- APU SHUT OFF PUSHBUTTON-SWITCH (1KL)
- APU FIRE/WARN MODULE (1WD)
- wiring
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 05-23-10-200-003 Zonal Inspection of Tail Cone APU and Accessory
Compartment
AMM 26-13-00-710-001 Operational Test of the APU Fire and Overheat
Detection System
AMM 26-22-00-710-001 Operational Test of the APU Fire-Extinguishing
Loop/Squib AMM 49-00-00-710-001 Self-Test of the ECB (59KD) (GTCP 36-300) AMM 49-11-11-000-001 Removal of the Auxiliary Power Unit (APU) - 4005KM
(GTCP 36-300) AMM 49-11-11-400-001 Installation of the Auxiliary Power Unit (APU) -4005KM (GTCP 36-300) AMM 49-61-34-000-001 Removal of the Electronic Control Box (ECB) (59KD) (GTCP 36-300) AMM 49-61-34-400-001 Installation of the Electronic Control Box (ECB) (59KD) (GTCP 36-300) AMM 49-62-00-710-001 Operational Test of Emergency Shutdown System (with
APU SHUT OFF Switch 1KL) (GTCP 36-300) AMM 49-81-41-000-001 Removal of the Exhaust Muffler (GTCP 36-300) AMM 49-81-41-400-001 Installation of the Exhaust Muffler (GTCP 36-300)
3. Fault Confirmation
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A. Do the subsequent checks.
(1) Make sure that the EMER SHUT DOWN was not caused by Maintenance Action.
(2) Make sure the APU FIRE pushbutton switch on the APU FIRE/WARN module (1WD) was not pushed by a person accidentally.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 001-003, 051-099, 401-499, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page A275
Config-1 Aug 01/05 CES
(3) Make sure the APU SHUT OFF (1KL) switch on the external power-control panel 108VU was not pushed by a person accidentally.
(4) Make sure that there is no water ingress in external power-control panel 108VU.
(5) Do the test of the APU fire detection system (Ref. AMM TASK 26-22-00-710-001).
(6) Do the ECB BITE Test (Ref. AMM TASK 49-00-00-710-001).
4. Fault Isolation
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A. If you find signs of water ingress in panel 108VU:
- remove the APU SHUT OFF switch (1KL).
- do a check for moisture/corrosion on the electrical connections.
- dry the electrical connections.
- re-install the APU SHUT OFF switch (1KL).
B. If the tests do not confirm the fault:
- do an inspection of the APU and the APU compartment and make sure that you do not find the signs of a fire (Ref. AMM TASK 05-23-10-200-003),
- do a check and make sure that the APU bleed-air duct is in the correct condition and connected correctly,
- do a check and make sure that the APU exhaust muffler is in the correct condition and connected correctly.
(1) If you find the signs of a fire when you do the inspection of the APU and the APU compartment:
- do the applicable repair(s).
(2) If the APU bleed-air duct is not in the correct condition and/or connected correctly:
- replace and/or connect the APU bleed-air duct correctly (Ref. AMM TASK 49-11-11-000-001) and (Ref. AMM TASK 49-11-11-400-001).
(3) If the APU exhaust muffler is not in the correct condition and/or connected correctly:
- replace and/or connect the APU exhaust muffler correctly (Ref. AMM TASK 49-81-41-000-001) and (Ref. AMM TASK 49-81-41-400-001).
(4) If the APU bleed-air duct and the APU exhaust muffler are in the correct condition and connected correctly: 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 机载辅助动力 1(64)
