W DOC AIRBUS | TSM A320F

Green System Pressure Indication on ECAM DU is out of Tolerance

TASK 29-11-00-810-809-A
Green System Pressure Indication on ECAM DU is out of Tolerance

1. Possible Causes
  • internal leakage
  • PUMP VARIABLE DTS [1030GK]
  • HYDR. PRESSURE TRANSMITTER [1065GN]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 12-12-29-611-001
Fill the Hydraulic Fluid Reservoir with a Hand Pump
AMM 12-12-29-611-002
Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 24-41-00-862-002
De-energize the Aircraft Electrical Circuits Supplied from the External Power
AMM 29-00-00-280-001
Check of the Internal Leakage of the Green Hydraulic System
AMM 29-00-00-280-006
Check of the Green or Yellow Hydraulic System after Engine Pump Failure or Operation in a Possible Cavitation Condition - with Ground Cart Available
AMM 29-11-51-000-040
Removal of the Green Engine Pump
AMM 29-11-51-000-805
Removal of the Green Engine Driven Pump
AMM 29-11-51-100-801
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-11-51-100-802
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-11-51-100-804
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-11-51-400-040
Installation of the Green Engine Pump
AMM 29-11-51-400-805
Installation of the Green Engine Driven Pump
AMM 29-14-00-614-002
Pressurization of the Hydraulic Reservoirs through the Ground Connector
AMM 29-23-00-863-001
Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-23-00-864-001
Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
AMM 29-32-11-000-001
Removal of the Hydraulic Pressure Transducer
AMM 29-32-11-400-001
Installation of the Hydraulic Pressure Transducer
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
AMM 71-00-00-710-001
Dry Motoring Check
AMM 71-00-00-720-809
Test No. 2 - Engine Motor Leak Test (Dry Method)
3. Fault Confirmation
Subtask 29-11-00-865-054-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUHYDRAULIC/G HYD/PUMP ENG1/CTL1701GKH12
** ON A/C NOT FOR ALL
121VUHYDRAULIC/G HYD/PUMP ENG1/CTL1701GKR35
** ON A/C ALL
121VUHYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST1881GPN35
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
Subtask 29-11-00-860-057-A
B. Aircraft Maintenance Configuration
   (1) Energize the aircraft electrical circuits AMM 24-41-00-861-002.
   (2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
   (3) On the ECAM control panel on the center pedestal, press the HYD pushbutton. Make sure that the HYD page is shown on the ECAM lower Display Unit (DU).
   (4) Make sure that the ECAM does not show any of these conditions:
  • Low air pressure in the Green reservoir
  • Low fluid level in the Green reservoir.
   (5) If necessary, pressurize the reservoir AMM 29-14-00-614-002.
   (6) If necessary, add fluid to the reservoir AMM 12-12-29-611-001 or AMM 12-12-29-611-002.
   (7) On the overhead panel 40VU, press the PTU/AUTO P/BSW (the OFF light comes on).
   (8) On the overhead panel 40VU, make sure that the GREEN/ENG 1 PUMP P/BSW is set to on (FAULT and OFF lights are off).
Subtask 29-11-00-710-062-A ** ON A/C NOT FOR ALL
C. Test
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
   (1) Dry-motor the left (No. 1) engine AMM 71-00-00-710-001.
   (2) Look for the Green hydraulic system pressure indication on the lower ECAM DU.
Subtask 29-11-00-710-062-B ** ON A/C NOT FOR ALL
C. Test
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
   (1) Dry-motor the left (No. 1) engine AMM 71-00-00-710-001.
   (2) Look for the Green hydraulic system pressure indication on the lower ECAM DU.
Subtask 29-11-00-710-062-D ** ON A/C NOT FOR ALL
C. Test
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROL SURFACES ARE CLEAR BEFORE YOU PRESSURIZE/DEPRESSURIZE A HYDRAULIC SYSTEM.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE.
   (1) Dry-motor the left (No. 1) engine AMM 71-00-00-720-809.
   (2) Look for the Green hydraulic system pressure indication on the lower ECAM DU.
4. Fault Isolation
Subtask 29-11-00-810-060-A ** ON A/C NOT FOR ALL
A. If the fault confirmation gives:
  • System pressure indication of 2750 psi on the lower ECAM DU:
   (1) On panel 50VU, set the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the left (No. 1) engine.
       2 Do a check of the internal leakage of the Green hydraulic system AMM 29-00-00-280-001 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Green hydraulic system from the Yellow hydraulic system through the PTU with the electric pump AMM 29-23-00-863-001.
       2 Look for the system pressure indication on the lower ECAM DU.
     (c) If the system pressure increases to more than 2750 psi:
       1 Depressurize the Green hydraulic system AMM 29-23-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-100-801.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-000-040 and AMM 29-11-51-400-040.
       6 Do a check of the engine pump for a possible cavitation condition AMM 29-00-00-280-006.
NOTE: A cavitation condition of the engine pump is possible when the engine pump operates with the engine pump fire valve closed (if you set the ENG 1 (2) FIRE pushbutton on the Eng/APU fire panel), or with the reservoir below the low level (ECAM indication).
     (d) If the fault continues, replace the HYDR. PRESSURE TRANSMITTER [1065GN] AMM 29-32-11-000-001 and AMM 29-32-11-400-001.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Green hydraulic system is a bit higher than usual (special for older A/C).
  • There is an additional ECAM tolerance of +/- 50psi, the system pressure indication on the ECAM is in 50 psi steps.
Subtask 29-11-00-810-060-C ** ON A/C NOT FOR ALL
A. If the fault confirmation gives:
  • System pressure indication of 2750 psi on the lower ECAM DU:
   (1) On panel 50VU, set the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the left (No. 1) engine.
       2 Do a check of the internal leakage of the Green hydraulic system AMM 29-00-00-280-001 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Green hydraulic system from the Yellow hydraulic system through the PTU with the electric pump AMM 29-23-00-863-001.
       2 Look for the system pressure indication on the lower ECAM DU.
     (c) If the system pressure increases to more than 2750 psi:
       1 Depressurize the Green hydraulic system AMM 29-23-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-100-802.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-000-040 and AMM 29-11-51-400-040.
       6 Do a check of the engine pump for a possible cavitation condition AMM 29-00-00-280-006.
NOTE: A cavitation condition of the engine pump is possible when the engine pump operates with the engine pump fire valve closed (if you set the ENG 1 (2) FIRE pushbutton on the Eng/APU fire panel), or with the reservoir below the low level (ECAM indication).
     (d) If the fault continues, replace the HYDR. PRESSURE TRANSMITTER [1065GN] AMM 29-32-11-000-001 and AMM 29-32-11-400-001.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Green hydraulic system is a bit higher than usual (special for older A/C).
  • There is an additional ECAM tolerance of +/- 50psi, the system pressure indication on the ECAM is in 50 psi steps.
Subtask 29-11-00-810-060-D ** ON A/C NOT FOR ALL
A. If the fault confirmation gives:
  • System pressure indication of 2750 psi on the lower ECAM DU:
   (1) On panel 50VU, set the HYD/LEAK MEASUREMENT VALVES/G pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the left (No. 1) engine.
       2 Do a check of the internal leakage of the Green hydraulic system AMM 29-00-00-280-001 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Green hydraulic system from the Yellow hydraulic system through the PTU with the electric pump AMM 29-23-00-863-001.
       2 Look for the system pressure indication on the lower ECAM DU.
     (c) If the system pressure increases to more than 2750 psi:
       1 Depressurize the Green hydraulic system AMM 29-23-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-100-804.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [1030GK] AMM 29-11-51-000-805 and AMM 29-11-51-400-805.
       6 Do a check of the engine pump for a possible cavitation condition AMM 29-00-00-280-006.
NOTE: A cavitation condition of the engine pump is possible when the engine pump operates with the engine pump fire valve closed (if you set the ENG 1 (2) FIRE pushbutton on the Eng/APU fire panel), or with the reservoir below the low level (ECAM indication).
     (d) If the fault continues, replace the HYDR. PRESSURE TRANSMITTER [1065GN] AMM 29-32-11-000-001 and AMM 29-32-11-400-001.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Green hydraulic system is a bit higher than usual (special for older A/C).
  • There is an additional ECAM tolerance of +/- 50psi, the system pressure indication on the ECAM is in 50 psi steps.
Subtask 29-11-00-710-063-A
B. Do the fault confirmation procedure as given in Para. 3. to make sure that operation is correct.
5. Close-up
Subtask 29-11-00-860-056-A
A. Put the aircraft back to the serviceable condition.
   (1) Do the EIS stop procedure
AMM 31-60-00-860-002.
   (2) De-energize the aircraft electrical circuits AMM 24-41-00-862-002.
[Rev.8 from Aug 2018] 2026.04.04 04:29:20 UTC
"WTRUIB" 2025