DOC AIRBUS | TSM A320FSymbol of the ENG 1 Pump on the ECAM Lower DU shows the Incorrect Position (when the G HYD SYS is Pressurized with the Engine Pump)
TASK 29-11-00-810-806-A
Symbol of the ENG 1 Pump on the ECAM Lower DU shows the Incorrect Position (when the G HYD SYS is Pressurized with the Engine Pump)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
3. Fault Confirmation
Subtask 29-11-00-710-058-A
Subtask 29-11-00-810-057-A ** ON A/C NOT FOR ALL
[Rev.8 from Aug 2018]
2026.04.04 04:29:20 UTC
Symbol of the ENG 1 Pump on the ECAM Lower DU shows the Incorrect Position (when the G HYD SYS is Pressurized with the Engine Pump)
1. Possible Causes
2. Job Set-up Information
A. Referenced Information
| REFERENCE | DESIGNATION |
|---|---|
| AMM 29-11-00-710-001 | Operational Test of the Green Hydraulic System |
| AWM 291102 | |
| AMM 29-11-17-000-040 | Removal of the Engine-Pump Pressure Switch |
| AMM 29-11-17-000-041 | Removal of the Engine-Pump Pressure Switch |
| AMM 29-11-17-400-040 | Installation of the Engine-Pump Pressure Switch |
| AMM 29-11-17-400-041 | Installation of the Engine-Pump Pressure Switch |
| AWM 315413 | |
| AMM 31-55-34-000-001 | Removal of the SDAC |
| AMM 31-55-34-400-001 | Installation of the SDAC |
| AWM 715102 |
Subtask 29-11-00-710-058-A
A. Do the operational test of the Green hydraulic system AMM 29-11-00-710-001.
(1) If during the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
4. Fault Isolation(1) If during the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
- LO in amber color and the system pressure is correct, go to Para 4.A.
- IN-Line in green color, go to Para 4.B.
Subtask 29-11-00-810-057-A ** ON A/C NOT FOR ALL
A. If during the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
(2) If the fault continues:
(a) Do a check of the aircraft wiring for a short circuit to ground between:
(a) Repair as necessary the aircraft wiring .
(b) Do the test given in Para. 3.
(4) If there is no short circuit to ground or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
Subtask 29-11-00-810-058-A ** ON A/C NOT FOR ALL - LO in amber color and the system pressure is correct:
(2) If the fault continues:
(a) Do a check of the aircraft wiring for a short circuit to ground between:
- The ENG-HYD.-PUMP-SW [1074GK] and the SDAC-1 [1WV1]
- The ENG-HYD.-PUMP-SW [1074GK] and the SDAC-2 [1WV2]
- AWM 715102, AWM 291102 and AWM 315413.
(a) Repair as necessary the aircraft wiring .
(b) Do the test given in Para. 3.
(4) If there is no short circuit to ground or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
B. If after the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
(2) If the fault continues:
(a) Do a check and repair as necessary the aircraft wiring from:
(3) If the wiring is correct or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
Subtask 29-11-00-810-057-C ** ON A/C NOT FOR ALL - IN-Line in green color:
(2) If the fault continues:
(a) Do a check and repair as necessary the aircraft wiring from:
- The ENG-HYD.-PUMP-SW [1074GK] to the SDAC-1 [1WV1]
- The ENG-HYD.-PUMP-SW [1074GK] to the SDAC-2 [1WV2]
- The ENG-HYD.-PUMP-SW [1074GK] to the ground
- AWM 715102, AWM 291102 and AWM 315413.
(3) If the wiring is correct or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
C. If during the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
(2) If the fault continues:
(a) Do a check of the aircraft wiring for a short circuit to ground between:
(a) Repair as necessary the aircraft wiring .
(b) Do the test given in Para. 3.
(4) If there is no short circuit to ground or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
Subtask 29-11-00-810-058-C ** ON A/C NOT FOR ALL - LO in amber color and the system pressure is correct:
(2) If the fault continues:
(a) Do a check of the aircraft wiring for a short circuit to ground between:
- The ENG-HYD.-PUMP-SW [1074GK] and the SDAC-1 [1WV1]
- The ENG-HYD.-PUMP-SW [1074GK] and the SDAC-2 [1WV2]
- AWM 715102, AWM 291102 and AWM 315413.
(a) Repair as necessary the aircraft wiring .
(b) Do the test given in Para. 3.
(4) If there is no short circuit to ground or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
D. If after the test the Eng 1 pump symbol on the HYD page of the lower ECAM DU shows:
(2) If the fault continues:
(a) Do a check and repair as necessary the aircraft wiring from:
(3) If the wiring is correct or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.
- IN-Line in green color:
(2) If the fault continues:
(a) Do a check and repair as necessary the aircraft wiring from:
- The ENG-HYD.-PUMP-SW [1074GK] to the SDAC-1 [1WV1]
- The ENG-HYD.-PUMP-SW [1074GK] to the SDAC-2 [1WV2]
- The ENG-HYD.-PUMP-SW [1074GK] to the ground
- AWM 715102, AWM 291102 and AWM 315413.
(3) If the wiring is correct or the fault continues:
(a) Replace the SDAC-1 [1WV1] or SDAC-2 [1WV2] , AMM 31-55-34-000-001 and AMM 31-55-34-400-001.
(b) Do the test given in Para. 3.