TASK 49-00-81-810-810
APU AUTO SHUTDOWN - OVERTEMPERATURE (on speed), High Temperature during APU
on-speed (131-9(A))
1. Possible Causes
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- NO LRU DETECTED
- blockage of the APU inlet
- APU internal damage
- damage of the IGV linkage
- IGV ACTUATOR (P21)
- APU (4005KM)
- IGV ACTUATOR (8014KM)
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
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REFERENCE QTY DESIGNATION
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No specific ratchet
No specific socket
B. Referenced Information
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REFERENCE DESIGNATION
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AMM 49-00-00-860-008 APU Start by External Power (131-9(A))
AMM 49-11-11-000-004 Removal of the Power Plant (APU) (131-9(A))
AMM 49-11-11-400-004 Installation of the Power Plant (APU) (131-9(A))
AMM 49-23-51-000-004 Removal of the Inlet Guide Vane - Actuator (8014KM)
(131-9(A))
AMM 49-23-51-400-004 Installation of the Inlet Guide Vane - Actuator
(8014KM) (131-9(A))
AMM 49-91-42-200-004 Inspection of the Magnetic- Drain Plug (8077KM)
(131-9(A))
3. Fault Confirmation
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A. Read-out of ECB Trouble-Shooting Data
(1) Put the APU MASTER SW to the ON position.
(2) Get access to the APU SHUTDOWN report.
(3) Push the '>' adjacent to LRU DATA:
- the MCDU menu shows
NO LRU DETECTED
(4) Start the APU and apply Bleed Air for 20 seconds, minimum (Ref. AMM TASK 49-00-00-860-008).
4. Fault Isolation
_______________
R **ON A/C 001-049, 101-105, 107-107, 151-154, 201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
OVERTEMPERATURE
IGV ACTUATOR P21/ECB (59KD)
associated with Fault Code Number (FCN) 205
- do a check for a blockage of the APU inlet.
(1) If the fault continues:
- do a check for APU internal damage:
- do check for contamination of the MAGNETIC-DRAIN PLUG (Ref. AMM TASK 49-91-42-200-004).
NOTE : If the MAGNETIC-DRAIN PLUG is not contaminated, continue
____
without starting the APU
- .
- remove the end cap from the STARTER MOTOR (8KA).
- use a socket and a ratchet on the shaft of the STARTER MOTOR (8KA) to turn the APU counterclockwise (in the direction of the arrow on the housing).
- make sure that the APU rotates freely.
(a) If the APU rotates freely:
- do a check for damage of the IGV linkage.
1 If the IGV linkage is damaged or the force to move the IGV
_
linkage exceeds 20lbs.
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
2 If the IGV linkage is OK:
_
- replace the IGV ACTUATOR (P21) (Ref. AMM TASK 49-23-51-000-004) and (Ref. AMM TASK 49-23-51-400-004).
(b) If the APU does not rotate freely:
- replace the APU (4005KM) (Ref. AMM TASK 49-11-11-000-004) and (Ref. AMM TASK 49-11-11-400-004).
「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 : 001-049, 101-105, 107-107, 151-199, ∞∞49-00-81∞∞∞∞∞∞∞∞∞∞Page 225
201-210, Config-1 Aug 01/05 CES **ON A/C 001-049, 101-105, 151-199, 201-210,
Post SB 49-1062 For A/C 001-049,101-105,151-154,201-207,
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
OVERTEMPERATURE
IGV ACTUATOR (8014KM) / ECB (59KD)
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本文链接地址：A320 Trouble Shooting Manual 排故手册 机载辅助动力 2(43)
