DOC AIRBUS | TSM A320FAPU AUTO SHUT DOWN - SENSOR FAILURE, EGT Thermocouple 1 and ECB 59KD Fault (APS 3200)
TASK 49-00-00-810-890-A
APU AUTO SHUT DOWN - SENSOR FAILURE, EGT Thermocouple 1 and ECB 59KD Fault (APS 3200)
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 49-00-00-710-228-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 49-00-00-810-141-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:24 UTC
APU AUTO SHUT DOWN - SENSOR FAILURE, EGT Thermocouple 1 and ECB 59KD Fault (APS 3200)
1. Possible Causes
EGT THERMOCOUPLE 1 (8057KM1) - ELECTRONIC CONTROL BOX [59KD]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 49-70-00-810-813-A | EGT-Thermocouple 1 Defective (APS 3200) |
| AMM 49-00-00-710-008 | Operational Test of the APU |
| AMM 49-61-34-000-002 | Removal of the Electronic Control Box (ECB) (APS 3200) |
| AMM 49-61-34-400-002 | Installation of the Electronic Control Box (ECB) (APS 3200) |
| AMM 49-72-15-000-001 | Removal of the Thermocouple (APS 3200) |
| AMM 49-72-15-400-002 | Installation of the Thermocouple (APS 3200) |
Subtask 49-00-00-710-228-A ** ON A/C NOT FOR ALL 4. Fault Isolation
Subtask 49-00-00-810-141-A ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurs during the operational test of the APU and the test gives the maintenance message:
EGT TC1 P30 AND ECB (59KD):
Subtask 49-00-00-710-229-A ** ON A/C NOT FOR ALL EGT TC1 P30 AND ECB (59KD):
- replace the
EGT THERMOCOUPLE 1 (8057KM1) AMM 49-72-15-000-001 and AMM 49-72-15-400-002. - replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-002 and AMM 49-61-34-400-002.
B. Do the operational test of the APU AMM 49-00-00-710-008.
NOTE: After the subsequent flight, make sure that the fault does not continue.
(1) If the APU CLASS 3 FAULTS page gives the maintenance message EGT TC1 P30 after the subsequent flight: - do the applicable trouble shooting procedure (Ref. TSM TASK 49-70-00-810-813).