- use a multimeter to do a resistance check across pin 1 and pin 2 of the LOW OIL PRESSURE SW (8091KM)
 (a) If the resistance value is > 10 Ohms:

 - replace the LOW OIL PRESSURE SWITCH (8091KM) (Ref. AMM TASK 49-94-14-000-003) and (Ref. AMM TASK 49-94-14-400-003).

 (b) If the resistance value is < 10 Ohms:

 - do a check of the aircraft wiring from the ECB (59KD) AB/C5 to the LOW OIL PRESSURE SW (8091KM) P14/1 and the LOW OIL PRESSURE SW (8091KM) P14/2 to GND (Ref. ASM 49-61/01).
 1 If the fault continues:
_
 - replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
R **ON A/C 001-049, 101-105, 107-107, 151-199, 201-210,
 B. Do the test given in para. 3.
 「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 248
 201-210, Config-1 Aug 01/05 CES

 TASK 49-00-81-810-819

 APU AUTO SHUTDOWN - LOW OIL PRESSURE, Loss of Oil Pressure (131-9(A))
 1. Possible Causes
_______________
 - NO LRU FAULT DETECTED
 - oil level

 - LOW OIL PRESSURE SWITCH (P14)

 - DEOIL SOLENOID (P15)

 - OIL LUBE MODULE

 - LOW OIL PRESSURE SWITCH (8091KM)

 - DEOIL SOLENOID (8083KM)

 - OIL LUBE MODULE (8080KM)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
49-00-81-810-867 Low-Oil Level (131-9(A))
 AMM 49-00-00-860-008 APU Start by External Power (131-9(A))
 AMM 49-61-34-000-003 Removal of the Electronic Control Box (ECB)

 (131-9(A)) AMM 49-61-34-400-003 Installation of the Electronic Control Box (ECB)
 (131-9(A)) AMM 49-90-00-600-007 Check and Replenish Oil Level (131-9(A)) AMM 49-91-45-000-003 Removal of Oil Lube Module (8080KM) (131-9(A)) AMM 49-91-45-400-003 Installation of Oil Lube Module (8080KM) (131-9(A)) AMM 49-91-49-000-003 Removal of De-Oil Solenoid (8083KM) (131-9(A)) AMM 49-91-49-400-003 Installation of De-Oil Solenoid (8083KM) (131-9(A)) AMM 49-94-14-000-003 Removal of the Low Oil Pressure Switch (8091KM)
 (131-9(A)) AMM 49-94-14-400-003 Installation of the Low Oil Pressure Switch (8091KM) (131-9(A))
 3. Fault Confirmation
__________________
 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 FAULT DETECTED

 「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 249
 201-210, Config-1 Aug 01/05 CES

 (4) Do the subsequent check and the operational test of the APU:

 (a) Do a check of the oil level in the APU oil reservoir (Ref. AMM TASK 49-90-00-600-007).

 - if you add more than 1 liter do the low oil-level condition trouble shooting (Ref. TASK 49-00-81-810-867).

 (b) Do the operational test of the APU (Ref. AMM TASK 49-00-00-860-008):

 NOTE : Operate the APU for min. 15 minutes under full load. This
____ makes sure that the oil temperature increases sufficiently.
 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:
 LOW OIL PRESSURE
 LOP SW P14 / OIL PUMP / DEOIL SOLENOID P15

 associated with the Fault Code Number (FCN) 208
 - replace the LOW OIL PRESSURE SWITCH (P14) (Ref. AMM TASK 49-94-14-000-003) and (Ref. AMM TASK 49-94-14-400-003).
 (1) If the fault continues:

 - replace the DEOIL SOLENOID (P15) (Ref. AMM TASK 49-91-49-000-003) and (Ref. AMM TASK 49-91-49-400-003).

 (2) If the fault continues:

 - replace the OIL LUBE MODULE (Ref. AMM TASK 49-91-45-000-003) and (Ref. AMM TASK 49-91-45-400-003).

 (3) If the fault continues:

 - replace the ECB (59KD) (Ref. AMM TASK 49-61-34-000-003) and (Ref. AMM TASK 49-61-34-400-003).
 B. If no APU auto-shutdown occurs during the operational test of the APU and the low oil pressure shutdown occured when the APU was cold soaked:
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：A320 Trouble Shooting Manual 排故手冊 機載輔助動力 2(52)