DOC AIRBUS | TSM A320FAPU AUTO SHUTDOWN - NO ACCELERATION, Fuel Flow disagrees with Command (131-9(A))
TASK 49-00-81-810-836-A
APU AUTO SHUTDOWN - NO ACCELERATION, Fuel Flow disagrees with Command (131-9(A))
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 49-00-81-710-160-A ** ON A/C NOT FOR ALL
Subtask 49-00-81-810-113-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:34:34 UTC
APU AUTO SHUTDOWN - NO ACCELERATION, Fuel Flow disagrees with Command (131-9(A))
1. Possible Causes
- FUEL FLOW DISAGREES WITH COMMAND
- 8022KM
- OIL LUBE MODULE 8080KM
- 8024KM
- 8020KM
- 8021KM
- ELECTRONIC CONTROL BOX [59KD]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 49-00-00-860-008 | APU Start by External Power |
| AMM 49-31-41-000-003 | Removal of the Primary and Secondary Fuel-Nozzle (131-9(A)) |
| AMM 49-31-41-400-003 | Installation of the Primary and Secondary Fuel- Nozzle (131-9(A)) |
| AMM 49-31-42-000-004 | Removal of the Primary and Secondary Fuel-Manifold (131-9(A)) |
| AMM 49-31-42-400-006 | Installation of the Primary and Secondary Fuel-Manifold (131-9(A)) |
| AMM 49-32-11-000-003 | Removal of the Fuel Control Unit (FCU) (131-9(A)) |
| AMM 49-32-11-400-003 | Installation of the Fuel Control Unit (FCU) (131-9(A)) |
| AMM 49-32-13-000-001 | Removal of Flow Divider and Solenoid Valve (131-9(A)) |
| AMM 49-32-13-400-001 | Installation of Flow Divider and Solenoid Valve (131-9(A)) |
| AMM 49-32-41-920-001 | Replacement of the Fuel Filter (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 49-91-45-000-003 | Removal of Oil Lube Module (131-9(A)) |
| AMM 49-91-45-400-003 | Installation of Oil Lube Module (131-9(A)) |
Subtask 49-00-81-710-160-A ** ON A/C NOT FOR ALL
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:
4. Fault Isolation(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
FUEL FLOW DISAGREES WITH COMMAND
Subtask 49-00-81-810-113-A ** ON A/C NOT FOR ALL
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
NO ACCELERATION
FUEL CONTROL UNIT P19/APU FUEL SUPPLY
associated with Fault Code Number (FCN) 79
- do a check for contamination of the fuel filter, if clogged then replace the APU FUEL FILTER AMM 49-32-41-920-001.
If the fault continues:
Subtask 49-00-81-810-113-B ** ON A/C NOT FOR ALL NO ACCELERATION
FUEL CONTROL UNIT P19/APU FUEL SUPPLY
associated with Fault Code Number (FCN) 79
- do a check for contamination of the fuel filter, if clogged then replace the APU FUEL FILTER AMM 49-32-41-920-001.
If the fault continues:
- Replace the FUEL CONTROL UNIT 8022KM AMM 49-32-11-000-003 and AMM 49-32-11-400-003.
If the fault continues: - Replace the OIL LUBE MODULE 8080KM AMM 49-91-45-000-003 and AMM 49-91-45-400-003.
If the fault continues: - Replace the FLOW DIVIDER 8024KM AMM 49-32-13-000-001 and AMM 49-32-13-400-001.
If the fault continues: - Replace the PRIMARY and SECONDARY FUEL-NOZZLE 8020KM and 8021KM AMM 49-31-41-000-003 and AMM 49-31-41-400-003.
If the fault continues: - Replace the PRIMARY and SECONDARY FUEL-MANIFOLD 8020KM and 8021KM AMM 49-31-42-000-004 and AMM 49-31-42-400-006.
If the fault continues: - Replace the ELECTRONIC CONTROL BOX [59KD] AMM 49-61-34-000-003 and AMM 49-61-34-400-003.
A. If an APU auto shutdown occurs during the APU operation and the APU SHUTDOWN report gives the maintenance message:
NO ACCELERATION
FUEL CTRL UNIT(8022KM) / APU FUEL SUPPLY
associated with Fault Code Number (FCN) 79
- do a check for contamination of the fuel filter, if clogged then replace the APU FUEL FILTER AMM 49-32-41-920-001.
If the fault continues:
Subtask 49-00-81-710-161-A ** ON A/C NOT FOR ALL NO ACCELERATION
FUEL CTRL UNIT(8022KM) / APU FUEL SUPPLY
associated with Fault Code Number (FCN) 79
- do a check for contamination of the fuel filter, if clogged then replace the APU FUEL FILTER AMM 49-32-41-920-001.
If the fault continues:
- Replace the FUEL CONTROL UNIT 8022KM AMM 49-32-11-000-003 and AMM 49-32-11-400-003.
If the fault continues: - Replace the OIL LUBE MODULE 8080KM AMM 49-91-45-000-003 and AMM 49-91-45-400-003.
If the fault continues: - Replace the FLOW DIVIDER 8024KM AMM 49-32-13-000-001 and AMM 49-32-13-400-001.
If the fault continues: - Replace the PRIMARY and SECONDARY FUEL-NOZZLE 8020KM and 8021KM AMM 49-31-41-000-003 and AMM 49-31-41-400-003.
If the fault continues: - Replace the PRIMARY and SECONDARY FUEL-MANIFOLD 8020KM and 8021KM AMM 49-31-42-000-004 and AMM 49-31-42-400-006.
If the fault continues: - 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.