DOC AIRBUS | TSM A320FAPU Bleed Pressure indication replaced by amber XX (131-9(A))
TASK 49-00-81-810-894-A
APU Bleed Pressure indication replaced by amber XX (131-9(A))
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 49-00-81-710-238-A ** ON A/C NOT FOR ALL
Subtask 49-00-81-810-159-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:38 UTC
APU Bleed Pressure indication replaced by amber XX (131-9(A))
1. Possible Causes
- Total Pressure Sensor
- ADIRU 2 is selected OFF or not available
- ELECTRONIC CONTROL BOX [59KD]
TOTAL PRESSURE SENSOR (8044KM) - ADIRU 1 is OFF or not available
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 49-00-81-810-854-A | Total-Pressure Transducer (P23) Fault (131-9(A)) |
| AMM 31-32-00-860-001 | Procedure to Get Access to the SYSTEM REPORT/TEST Menu Page |
| AMM 34-10-00-860-002 | ADIRS Start Procedure |
| AMM 49-00-00-710-010 | Operational Test of the APU |
| 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)) |
Subtask 49-00-81-710-238-A ** ON A/C NOT FOR ALL
A. Do the operational test of the APU AMM 49-00-00-710-010.
(1) Do a check of the APU Bleed Pressure indication on the lower ECAM DU (APU Page).
(2) On the MCDU, get access to the APU menu page SYSTEM REPORT/TEST AMM 31-32-00-860-001.
(3) Select the LAST LEG REPORT page.
4. Fault Isolation(1) Do a check of the APU Bleed Pressure indication on the lower ECAM DU (APU Page).
(2) On the MCDU, get access to the APU menu page SYSTEM REPORT/TEST AMM 31-32-00-860-001.
(3) Select the LAST LEG REPORT page.
Subtask 49-00-81-810-159-A ** ON A/C NOT FOR ALL
A. Maintenance Action
(1) If there is a fault message
TOTAL PRESS XDCR (8044KM)
with the LRU TROUBLE SHOOT DATA menu information:
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE HIGH
Fault Code Number: 029
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE LOW
Fault Code Number: 028
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE
Fault Code Number: 026
and the Bleed Pressure indication is replaced by amber XX:
Subtask 49-00-81-810-159-B ** ON A/C NOT FOR ALL (1) If there is a fault message
TOTAL PRESS XDCR (8044KM)
with the LRU TROUBLE SHOOT DATA menu information:
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE HIGH
Fault Code Number: 029
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE LOW
Fault Code Number: 028
or
TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE
Fault Code Number: 026
and the Bleed Pressure indication is replaced by amber XX:
- do the trouble shooting of the Total Pressure Sensor (Ref. TSM TASK 49-00-81-810-854).
- do a check if the ADIRU 2 is selected OFF or not available .
- do the ADIRS start procedure AMM 34-10-00-860-002.
- replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.
A. Maintenance Procedure
(1) If the APU bleed-pressure indication is an amber XX and there is the fault message TOTAL PRESS XDCR (8044KM) with the LRU TROUBLESHOOT DATA menu information:
TOTAL PRESSURE SENSOR (8044KM) (Ref. TSM TASK 49-00-81-810-854).
(2) If the APU bleed-pressure indication is an amber XX and there is no fault message:
Subtask 49-00-81-710-239-A ** ON A/C NOT FOR ALL (1) If the APU bleed-pressure indication is an amber XX and there is the fault message TOTAL PRESS XDCR (8044KM) with the LRU TROUBLESHOOT DATA menu information:
- TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE HIGH
Fault Code Number: 029
or - TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE LOW
Fault Code Number: 028
or - TOTAL PRESSURE SENSOR SHOWS OUT OF RANGE
Fault Code Number: 026.
(2) If the APU bleed-pressure indication is an amber XX and there is no fault message:
- Do a check of the status of ADIRU 1.
- Do the ADIRS start procedure AMM 34-10-00-860-002.
- Replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.
B. Do the test given in Para. 3.