TASK 49-00-00-810-897
APU AUTO SHUT DOWN - NO ACCELERATION, Start System Fault (APS 3200)
1. Possible Causes
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- COOLING FAN/PMG ASSY (8053KM)
- STARTER MOTOR (8KA)
- STARTER CLUTCH (8033KM)
- ECB (59KD)
- AUXILIARY POWER UNIT (4005KM)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 49-00-00-710-008 Operational Test of the APU (APS 3200)
AMM 49-11-11-000-003 Removal of the Power Plant (APU) (APS 3200)
AMM 49-11-11-400-003 Installation of the Power Plant (APU) (APS 3200)
AMM 49-42-51-000-003 Removal of the Starter Motor (8KA) (APS 3200)
AMM 49-42-51-200-006 Check Wear Indicator of Starter Motor Brush (APS
3200) AMM 49-42-51-400-003 Installation of the Starter Motor (8KA) (APS 3200) AMM 49-42-52-000-002 Removal of the Starter Motor Clutch (8033KM) (APS
3200) AMM 49-42-52-400-002 Installation of the Starter Motor Clutch (8033KM) (APS 3200) AMM 49-52-53-000-001 Removal of the PMG and Cooling Fan Assembly (8055KM) (APS 3200) AMM 49-52-53-400-001 Installation of the PMG and Cooling Fan Assembly (8055KM) (APS 3200) AMM 49-61-34-000-002 Removal of the Electronic Control Box (ECB) (59KD) (APS 3200) AMM 49-61-34-400-002 Installation of the Electronic Control Box (ECB) (59KD) (APS 3200)
3. Fault Confirmation
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A. Do the operational-test of the APU (Ref. AMM TASK 49-00-00-710-008).
4. Fault Isolation
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A. If the APU Last Leg Report gives the maintenance message:
STARTER MOTOR (8KA) / STARTER CLUTCH (8033KM):
Fault Code Number: 051 or 053
NOTE : The APU SHUTDOWNS report gives the maintenance message:
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「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 : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page 240
Config-2 Aug 01/05 CES
NO ACCELERATION - STARTER MOTOR (8KA) / STARTER CLUTCH (8033KM) APU Auto Shut Down Fault Code Number: 051 or 053
- check that the fan of the COOLING FAN/PMG ASSY (8053KM) turns freely.
(1) If the fan does not turn freely:
- replace the COOLING FAN/PMG ASSY (8053KM) (Ref. AMM TASK 49-52-53-000-001) and (Ref. AMM TASK 49-52-53-400-001).
(2) If the fault continues:
- remove the STARTER MOTOR (8KA) (Ref. AMM TASK 49-42-51-000-003),
- do a starter motor-brush inspection (Ref. AMM TASK 49-42-51-200-006),
- examine the starter motor for the signs of a mechanical fault,
- do a check and make sure that the STARTER CLUTCH (8033KM) operates correctly.
NOTE : Turn the STARTER CLUTCH (8033KM) with your hand in a clockwise
____ and then in a counterclockwise direction. Make sure that the clutch engages and disengages correctly.
- The starter motor clutch engages correctly if: . it engages immediately, . it does not rub, . it does not make unusual noise.
- The starter motor clutch disengages correctly if: . it disengages immediately, . it does not rub, . it does not make unusual noise.
- turn manually the drive shaft of the cooling fan assembly and make sure that: . you can turn the drive shaft of the cooling fan freely, . the APU rotors, bearings and gears do not rub, . the APU rotors, bearings and gears do not make unsual noise.
(3) If the starter motor clutch engages/disengages correctly and the APU drag check is O.K.:
- install a new STARTER MOTOR (8KA) (Ref. AMM TASK 49-42-51-400-003).
(4) If the starter motor clutch does not engage/disengage correctly:
- replace the STARTER CLUTCH (8033KM) (Ref. AMM TASK 49-42-52-000-002) and (Ref. AMM TASK 49-42-52-400-002).
- install a serviceable STARTER MOTOR (8KA) (Ref. AMM TASK 49-42-51-400-003).
(a) If the fault continues:
- replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-002) and (Ref. AMM TASK 49-61-34-400-002).
「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 : 106-106, 108-149, 211-299, 301-399, ∞∞49-00-00∞∞∞∞∞∞∞∞∞∞Page 241
Config-2 Aug 01/05 CES
(5) If you find that the drag of the APU rotors, bearings and gears is too much, they do rub or they make unsual noise: 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(97)
