Engine-driven pump (EDP) does not stop when GREEN ENG 1 PUMP P/BSW is OFF

TASK 29-11-00-810-818-A
Engine-driven pump (EDP) does not stop when GREEN ENG 1 PUMP P/BSW is OFF

1. Possible Causes

CONNECTOR(1030GK-A)
PUMP VARIABLE DTS [1030GK]
P/BSW 1705GK
engine pump solenoid-valve
C/B-HYDRAULIC/G HYD/PUMP ENG1/CTL [1701GK]
SDAC

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 29-11-00-710-001	Operational Test of the Green Hydraulic System
ASM 291101
AMM 29-11-51-000-011	Removal of the Solenoid-Valve of Engine Pump
AMM 29-11-51-000-803	Removal of the Solenoid-Valve of Engine Pump
AMM 29-11-51-400-011	Installation of the Solenoid-Valve of Engine Pump
AMM 29-11-51-400-803	Installation of the Solenoid-Valve of Engine Pump

3. Fault Confirmation
Subtask 29-11-00-710-068-A

A. Do the operational test of the green hydraulic system AMM 29-11-00-710-001.
(1) If the hydraulic pressure during the test of the Green hydraulic system does not decrease to 0 psi (0.0 bar), go to para 4. A.

4. Fault Isolation
Subtask 29-11-00-810-074-A ** ON A/C NOT FOR ALL

A. If the test confirms the fault:
(1) Do a check of the EDP:
(a) Disconnect the electrical connector CONNECTOR(1030GK-A) from the PUMP VARIABLE DTS [1030GK] .
(b) Make sure that the P/BSW 1705GK is released.
(c) On the electrical connector CONNECTOR(1030GK-A), do a check for +28VDC at pin 3.
(d) Connect the electrical connector CONNECTOR(1030GK-A) to the PUMP VARIABLE DTS [1030GK] .
(e) If there is +28VDC and the EDP P/N is 887673 or 3031863-001:
1 Replace the engine pump solenoid-valve AMM 29-11-51-000-803 and AMM 29-11-51-400-803.
2 Do the test given in Para. 3.
(f) If the fault continues:
1 Replace the PUMP VARIABLE DTS [1030GK] .
2 Do the test given in Para. 3.
(2) If the fault continues:
(a) Remove the P/BSW 1705GK.
(b) On the rack, do a check for +28VDC at pin AA/C3.
(c) Install the P/BSW 1705GK.
(d) If there is +28VDC:
1 Replace the P/BSW 1705GK.
2 Do the test given in Para. 3.
(3) If the fault continues:
(a) Do a check of the aircraft wiring between:

The PUMP VARIABLE DTS [1030GK] and the P/BSW 1705GK
The P/BSW 1705GK and the C/B-HYDRAULIC/G HYD/PUMP ENG1/CTL [1701GK]
The PUMP VARIABLE DTS [1030GK] and the SDAC
ASM 291101.

Subtask 29-11-00-810-074-B ** ON A/C NOT FOR ALL

A. If the test confirms the fault:
(1) Do a check of the EDP:
(a) Disconnect the electrical connector CONNECTOR(1030GK-A) from the PUMP VARIABLE DTS [1030GK] .
(b) Make sure that the P/BSW 1705GK is released.
(c) On the electrical connector CONNECTOR(1030GK-A), do a check for +28VDC at pin 3.
(d) Connect the electrical connector CONNECTOR(1030GK-A) to the PUMP VARIABLE DTS [1030GK] .
(e) If there is +28VDC and the EDP P/N is 887673 or 3031863-001:
1 Replace the engine pump solenoid-valve AMM 29-11-51-000-011 and AMM 29-11-51-400-011.
2 Do the test given in Para. 3.
(f) If the fault continues:
1 Replace the PUMP VARIABLE DTS [1030GK] .
2 Do the test given in Para. 3.
(2) If the fault continues:
(a) Remove the P/BSW 1705GK.
(b) On the rack, do a check for +28VDC at pin AA/C3.
(c) Install the P/BSW 1705GK.
(d) If there is +28VDC:
1 Replace the P/BSW 1705GK.
2 Do the test given in Para. 3.
(3) If the fault continues:
(a) Do a check of the aircraft wiring between:

The PUMP VARIABLE DTS [1030GK] and the P/BSW 1705GK
The P/BSW 1705GK and the C/B-HYDRAULIC/G HYD/PUMP ENG1/CTL [1701GK]
The PUMP VARIABLE DTS [1030GK] and the SDAC
ASM 291101.

5. Close-up
Subtask 29-11-00-942-051-A

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.

[Rev.8 from Aug 2018] 2026.04.04 04:29:21 UTC