DOC AIRBUS | TSM A320FAPU AUTO SHUT DOWN - SENSOR FAILURE, Oil Pressure Switch and Oil Level Sensor Fault (APS 3200)
TASK 49-00-00-810-881-A
APU AUTO SHUT DOWN - SENSOR FAILURE, Oil Pressure Switch and Oil Level Sensor Fault (APS 3200)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 49-00-00-710-210-A ** ON A/C NOT FOR ALL
Subtask 49-00-00-810-132-B ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:23 UTC
APU AUTO SHUT DOWN - SENSOR FAILURE, Oil Pressure Switch and Oil Level Sensor Fault (APS 3200)
1. Possible Causes
OIL LEVEL SENSOR (8089KM) - SWITCH-LOP [8091KM]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 2052210 | |
| ESPM 2053210 | |
| ESPM 205321A | |
| AMM 49-00-00-710-005 | Self-Test of the ECB |
| ASM 496102 | |
| AMM 49-90-00-600-004 | Check Oil Level and Replenish (APS 3200) |
| AMM 49-93-17-000-001 | Removal of the Oil Level Sensor (8089KM) (APS 3200) |
| AMM 49-93-17-400-001 | Installation of the Oil Level Sensor (8089KM) (APS 3200) |
| AMM 49-94-14-000-002 | Removal of the Oil Pressure Switch (APS 3200) |
| AMM 49-94-14-400-002 | Installation of the Oil Pressure Switch (APS 3200) |
Subtask 49-00-00-710-210-A ** ON A/C NOT FOR ALL
A. Oil Level Check and Test
(1) Do a check of the oil level in the APU oil reservoir and do the oil servicing if you find that the oil level is not sufficient AMM 49-90-00-600-004.
(2) Do the self-test of the ECB (59KD) AMM 49-00-00-710-005.
4. Fault Isolation(1) Do a check of the oil level in the APU oil reservoir and do the oil servicing if you find that the oil level is not sufficient AMM 49-90-00-600-004.
(2) Do the self-test of the ECB (59KD) AMM 49-00-00-710-005.
Subtask 49-00-00-810-132-B ** ON A/C NOT FOR ALL
A. If the test gives the maintenance message:
OIL PRESS SW (8091KM) AND OIL LEVEL SNSR (8089KM)
Fault Code Number: 140
Additionally:
Fault Code Number: 43 and 50
or
Fault Code Number: 43 and 49
Subtask 49-00-00-710-211-A ** ON A/C NOT FOR ALL OIL PRESS SW (8091KM) AND OIL LEVEL SNSR (8089KM)
Fault Code Number: 140
Additionally:
Fault Code Number: 43 and 50
or
Fault Code Number: 43 and 49
NOTE: The APU SHUTDOWNS report gives the maintenance message:
SENSOR FAILURE - OIL PRESS SW (8091KM) AND OIL LEVEL SNSR (8089KM)
APU Auto Shut Down Fault Code Number: 140
SENSOR FAILURE - OIL PRESS SW (8091KM) AND OIL LEVEL SNSR (8089KM)
APU Auto Shut Down Fault Code Number: 140
NOTE: Message does not appear in case of self-test of the ECB
(1) If the fault continues:- replace the
OIL LEVEL SENSOR (8089KM) AMM 49-93-17-000-001 and AMM 49-93-17-400-001. - replace the SWITCH-LOP [8091KM] AMM 49-94-14-000-002 and AMM 49-94-14-400-002.
- do a check and repair the wiring from the ECB (59KD) AB/C5, J4 to the OIL PRESSURE SWITCH P14/1, 2 ASM 496102 ESPM 2052210 ESPM 205321A ESPM 2053210.
- do a check and repair the wiring from the ECB (59KD) AB/H2, J4 to the OIL LEVEL SENSOR (8089KM) P8/1, 2 ASM 496102 ESPM 2052210 ESPM 205321A ESPM 2053210.
B. Do the test given in Para. 3.