DOC AIRBUS | TSM A320FWing Anti-Ice Control-Valve Failed Open
TASK 30-11-00-810-801-A
Wing Anti-Ice Control-Valve Failed Open
A. Referenced Information
3. Fault Confirmation
Subtask 30-11-00-710-050-A
Subtask 30-11-00-810-050-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:29:30 UTC
Wing Anti-Ice Control-Valve Failed Open
WARNING:
DO NOT TOUCH THE ANTI-ICE DUCTS UNTIL THEY ARE COOL. THE TEMPERATURE OF THE DUCTS STAYS HIGH FOR SOME TIME AFTER THE ENGINE STOPS.
1. Possible Causes- VALVE-WING ANTI ICE CONTROL, L [9DL]
- VALVE-WING ANTI ICE CONTROL, R [10DL]
- RELAY-ANTI ICE VALVE CONTROL 5DL
- aircraft wiring
- ZONE CONTROLLER [8HK]
- CONT-AIR COND SYSTEM 2 [57HH]
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| ESPM 204650 | |
| ESPM 205200 | |
| ESPM 205300 | |
| AMM 21-61-34-000-002 | Removal of the Air-Conditioning System Controller |
| AMM 21-61-34-400-002 | Installation of the Air-Conditioning System Controller |
| ASM 216301 | |
| AMM 21-63-34-000-001 | Removal of the Zone Controller |
| AMM 21-63-34-400-001 | Installation of the Zone Controller |
| AMM 30-11-00-710-001 | Operational Test of the Wing Ice-Protection System |
| ASM 301101 | |
| AMM 30-11-51-000-001 | Removal of the Wing Anti-Ice Control Valve |
| AMM 30-11-51-400-001 | Installation of the Wing Anti-Ice Control Valve |
Subtask 30-11-00-710-050-A
A. Procedure
(1) With no electrical power or bleed air supplied to the wing anti-ice system:
(a) Examine the identified defective Valve-Wing Anti Ice Control L(R) 9DL(10DL).
4. Fault Isolation(1) With no electrical power or bleed air supplied to the wing anti-ice system:
(a) Examine the identified defective Valve-Wing Anti Ice Control L(R) 9DL(10DL).
Subtask 30-11-00-810-050-A ** ON A/C NOT FOR ALL
A. If there is confirmation of the fault:
(1) If the locking lever position on the Wing Anti-Ice (WAI) valve 9DL(10DL) shows that the valve is open:
(2) If the WAI valve 9DL(10DL) is closed in Para. 3.A.(1):
(a) Supply bleed air to the WAI system AMM 30-11-00-710-001, but do not set the P/BSW-Anti-Ice Wing (3DL) to on.
1 If the locking lever position shows the WAI valve is open:
(3) If the fault continues:
(a) Do a check of the aircraft wiring between the WAI valve 9DL(10DL) and the Relay Anti-Ice Valve Control (5DL)
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the WAI system AMM 30-11-00-710-001.
(4) If no faults are found in the WAI system:
(a) Do a check of the aircraft wiring between the applicable wing anti-ice control-valve (9DL) or (10DL), connector A pin J and the SDAC ATA 31-54
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(5) If the fault continues:
(a) Replace the ZONE CONTROLLER [8HK] , AMM 21-63-34-000-001 and AMM 21-63-34-400-001.
(b) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(6) If the fault continues:
(a) Do a check of the aircraft wiring between the VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] and ZONE CONTROLLER [8HK]
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
Subtask 30-11-00-810-050-B ** ON A/C NOT FOR ALL (1) If the locking lever position on the Wing Anti-Ice (WAI) valve 9DL(10DL) shows that the valve is open:
NOTE: A serviceable WAI valve will not open if:
(a) Replace the applicable VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] , AMM 30-11-51-000-001 and AMM 30-11-51-400-001. - There is no bleed air supply
- The electrical circuits are de-energized.
(2) If the WAI valve 9DL(10DL) is closed in Para. 3.A.(1):
(a) Supply bleed air to the WAI system AMM 30-11-00-710-001, but do not set the P/BSW-Anti-Ice Wing (3DL) to on.
NOTE: This makes sure that the WAI valve has not opened with:
(b) Examine the locking lever position on the WAI valve 9DL(10DL): - Bleed air supplied
- The electrical circuits de-energized.
1 If the locking lever position shows the WAI valve is open:
- Do a check for 28VDC at the WAI valve connector A pin A
ASM 301101:
- Replace the WAI valve 9DL(10DL) AMM 30-11-51-000-001 and AMM 30-11-51-400-001.
- Replace the RELAY-ANTI ICE VALVE CONTROL 5DL ESPM 204650
- Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
NOTE: The WAI valve automatically moves to the closed position when the electrical circuits are de-energized.
a Do the operational test of the wing anti-ice system AMM 30-11-00-710-001: - If the test shows a fault, do the trouble shooting related to the maintenance message.
(3) If the fault continues:
(a) Do a check of the aircraft wiring between the WAI valve 9DL(10DL) and the Relay Anti-Ice Valve Control (5DL)
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the WAI system AMM 30-11-00-710-001.
(4) If no faults are found in the WAI system:
(a) Do a check of the aircraft wiring between the applicable wing anti-ice control-valve (9DL) or (10DL), connector A pin J and the SDAC ATA 31-54
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(5) If the fault continues:
(a) Replace the ZONE CONTROLLER [8HK] , AMM 21-63-34-000-001 and AMM 21-63-34-400-001.
(b) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(6) If the fault continues:
(a) Do a check of the aircraft wiring between the VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] and ZONE CONTROLLER [8HK]
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
A. If there is confirmation of the fault:
(1) If the locking lever position on the Wing Anti-Ice (WAI) valve 9DL(10DL) shows that the valve is open:
(2) If the WAI valve 9DL(10DL) is closed in Para. 3.A.(1):
(a) Supply bleed air to the WAI system AMM 30-11-00-710-001, but do not set the P/BSW-Anti-Ice Wing (3DL) to on.
1 If the locking lever position shows the WAI valve is open:
(3) If the fault continues:
(a) Do a check of the aircraft wiring between the WAI valve 9DL(10DL) and the Relay Anti-Ice Valve Control (5DL)
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the WAI system AMM 30-11-00-710-001.
(4) If no faults are found in the WAI system:
(a) Do a check of the aircraft wiring between the applicable wing anti-ice control-valve (9DL) or (10DL), connector A pin J and the SDAC ATA 31-54
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(5) If the fault continues:
(a) Replace the CONT-AIR COND SYSTEM 2 [57HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.
(b) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(6) If the fault continues:
(a) Do a check of the aircraft wiring between the VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] and CONT-AIR COND SYSTEM 2 [57HH]
ASM 216301
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(1) If the locking lever position on the Wing Anti-Ice (WAI) valve 9DL(10DL) shows that the valve is open:
NOTE: A serviceable WAI valve will not open if:
(a) Replace the applicable VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] , AMM 30-11-51-000-001 and AMM 30-11-51-400-001. - There is no bleed air supply
- The electrical circuits are de-energized.
(2) If the WAI valve 9DL(10DL) is closed in Para. 3.A.(1):
(a) Supply bleed air to the WAI system AMM 30-11-00-710-001, but do not set the P/BSW-Anti-Ice Wing (3DL) to on.
NOTE: This makes sure that the WAI valve has not opened with:
(b) Examine the locking lever position on the WAI valve 9DL(10DL): - Bleed air supplied
- The electrical circuits de-energized.
1 If the locking lever position shows the WAI valve is open:
- Do a check for 28VDC at the WAI valve connector A pin A
ASM 301101:
- Replace the WAI valve 9DL(10DL) AMM 30-11-51-000-001 and AMM 30-11-51-400-001.
- Replace the RELAY-ANTI ICE VALVE CONTROL 5DL ESPM 204650
- Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
NOTE: The WAI valve automatically moves to the closed position when the electrical circuits are de-energized.
a Do the operational test of the wing anti-ice system AMM 30-11-00-710-001: - If the test shows a fault, do the trouble shooting related to the maintenance message.
(3) If the fault continues:
(a) Do a check of the aircraft wiring between the WAI valve 9DL(10DL) and the Relay Anti-Ice Valve Control (5DL)
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the WAI system AMM 30-11-00-710-001.
(4) If no faults are found in the WAI system:
(a) Do a check of the aircraft wiring between the applicable wing anti-ice control-valve (9DL) or (10DL), connector A pin J and the SDAC ATA 31-54
ASM 301101
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(5) If the fault continues:
(a) Replace the CONT-AIR COND SYSTEM 2 [57HH] AMM 21-61-34-000-002 and AMM 21-61-34-400-002.
(b) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.
(6) If the fault continues:
(a) Do a check of the aircraft wiring between the VALVE-WING ANTI ICE CONTROL, L [9DL] or VALVE-WING ANTI ICE CONTROL, R [10DL] and CONT-AIR COND SYSTEM 2 [57HH]
ASM 216301
ESPM 205200.
(b) Repair all the unserviceable wiring and connectors ESPM 205300.
(c) Do the operational test of the wing anti-ice system AMM 30-11-00-710-001.