DOC AIRBUS | TSM A320FAPU Fuel Pump does not operate with the FUEL LINE VENT Pushbutton Switch
TASK 28-22-00-810-803-A
APU Fuel Pump does not operate with the FUEL LINE VENT Pushbutton Switch
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 28-22-00-710-052-A
Subtask 28-22-00-810-053-A
[Rev.8 from Aug 2018]
2026.04.04 04:28:40 UTC
APU Fuel Pump does not operate with the FUEL LINE VENT Pushbutton Switch
1. Possible Causes
- RELAY 6QC
- P/BSW-VENT APU FUEL LINE [8QC]
- wiring
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| TSM TASK 28-22-00-810-801-A | APU Fuel System - Low Pressure |
| AMM 28-22-00-710-001 | Operational Test of the APU Fuel-Pump System on Ground to Purge the Fuel Line |
| AMM 28-22-00-710-006 | Operational Test of the APU Fuel Pump |
| ASM 282201 |
Subtask 28-22-00-710-052-A
A. Do the operational test of the APU fuel pump system om ground AMM 28-22-00-710-001.
4. Fault IsolationNOTE: Make sure that the subsequent system is serviceable before you start the fault isolation procedure:
- the main fuel pump system (Ref. 28-21-00),
- the APU LP fuel shutoff system (Ref. 28-29-00).
Subtask 28-22-00-810-053-A
A. If the test confirms the fault:
Subtask 28-22-00-710-053-A - do the operational test of the APU fuel pump AMM 28-22-00-710-006.
- do the trouble shooting of the APU fuel system (Ref. TSM TASK 28-22-00-810-801).
- do a check of the RELAY 6QC and replace if necessary.
- do a check of the P/BSW-VENT APU FUEL LINE [8QC] and replace if necessary.
- do a check and repair the wiring from the:
CB 3QC to the FUEL LINE VENT pushbutton switch (8QC) A/1,
FUEL LINE VENT pushbutton switch (8QC) A/3 to the GND ASM 282201.
B. Do the test given in Para. 3.