DOC AIRBUS | TSM A320FFailure of the Control of the Solenoid of the Engine 1 Fuel Return-Valve, on Channel B
TASK 73-10-00-810-811-A
Failure of the Control of the Solenoid of the Engine 1 Fuel Return-Valve, on Channel B
1. Possible Causes
A. Referenced Information
3. Fault Confirmation
Subtask 73-10-00-710-068-A ** ON A/C NOT FOR ALL
Subtask 73-10-00-810-060-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:41:01 UTC
Failure of the Control of the Solenoid of the Engine 1 Fuel Return-Valve, on Channel B
1. Possible Causes
- ECU [4000KS]
- harness J8
- fuel return valve
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 73-11-50-000-001 | Removal of the Fuel Return Valve |
| AMM 73-11-50-400-001 | Installation of the Fuel Return Valve |
| AMM 73-21-50-000-007 | Removal of J8 Harness |
| AMM 73-21-50-400-007 | Installation of the J8 Harness |
| AMM 73-21-60-000-001 | Removal of the Electronic Control Unit (ECU) |
| AMM 73-21-60-400-001 | Installation of the Electronic Control Unit (ECU) |
| AMM 73-29-00-710-040 | Operational Test of the FADEC on the ground (with Engine Motoring) |
Subtask 73-10-00-710-068-A ** ON A/C NOT FOR ALL
A. Do the operational test of the FADEC 1B on the ground (with engine non motoring) AMM 73-29-00-710-040.
4. Fault IsolationSubtask 73-10-00-810-060-A ** ON A/C NOT FOR ALL
A. The fault is generated if the ECU detects that the current drawn by the FRV solenoid is out of defined limits.
(1) If the test does not give the maintenance message FRV, J8, ECU, no further action is due.
(2) If the test does not give the maintenance message FRV, J8, ECU but the fault is repetitive, do a check of the J8 harness and connectors at the ECU and the FRV for looseness, contamination or damage.
Clean tighten or replace as required
- If nothing is found or fault continues:
. Replace the fuel return valve AMM 73-11-50-000-001 or AMM 73-11-50-400-001.
- If the fault continues:
. Replace the harness J8 AMM 73-21-50-000-007 or AMM 73-21-50-400-007.
- If the fault continues:
. Replace the ECU AMM 73-21-60-000-001 or AMM 73-21-60-400-001.
(3) If the test gives the maintenance message FRV, J8, ECU:
(a) disconnect the harness J8 from the ECU (4000KS) and do a resistance check on the harness connector between:
. pins 4 and 5 (15 to 46 Ohms)
. pins 4 and 1 (> 10 Megohms)
. pin 4 and the ground (> 10 Megohms).
1 If the resistance values are in the specified limits:
Subtask 73-10-00-710-069-A ** ON A/C NOT FOR ALL (1) If the test does not give the maintenance message FRV, J8, ECU, no further action is due.
(2) If the test does not give the maintenance message FRV, J8, ECU but the fault is repetitive, do a check of the J8 harness and connectors at the ECU and the FRV for looseness, contamination or damage.
Clean tighten or replace as required
- If nothing is found or fault continues:
. Replace the fuel return valve AMM 73-11-50-000-001 or AMM 73-11-50-400-001.
- If the fault continues:
. Replace the harness J8 AMM 73-21-50-000-007 or AMM 73-21-50-400-007.
- If the fault continues:
. Replace the ECU AMM 73-21-60-000-001 or AMM 73-21-60-400-001.
(3) If the test gives the maintenance message FRV, J8, ECU:
(a) disconnect the harness J8 from the ECU (4000KS) and do a resistance check on the harness connector between:
. pins 4 and 5 (15 to 46 Ohms)
. pins 4 and 1 (> 10 Megohms)
. pin 4 and the ground (> 10 Megohms).
1 If the resistance values are in the specified limits:
- replace the ECU [4000KS] AMM 73-21-60-000-001 and AMM 73-21-60-400-001.
- disconnect the harness J8 from the FRV solenoid and do a check at the fuel return valve connector between:
. pins 1 and 2 (15 to 46 Ohms)
. pins 1 and 3 (> 10 Megohms)
. pin 1 and the ground (> 10 Megohms).
- replace the harness J8 AMM 73-21-50-000-007 and AMM 73-21-50-400-007.
- replace the fuel return valve AMM 73-11-50-000-001 and AMM 73-11-50-400-001.
B. Do the test given in Para. 3.A.