W DOC AIRBUS | TSM A320F

Indication of the Hydraulic Fluid Quantity of the Green Reservoir shows High or Low Level or fluctuates

TASK 29-11-00-810-813-A
Indication of the Hydraulic Fluid Quantity of the Green Reservoir shows High or Low Level or fluctuates

1. Possible Causes
  • gas leaks
  • HYD ACCU GREEN [1070GM]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
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 29-00-00-870-001
Bleeding Procedure of the Green Hydraulic System Upstream of the Engine Pump
AMM 29-00-00-870-002
Bleeding Procedure of the Green Hydraulic System Upstream of the PTU
AMM 29-00-00-870-003
Bleeding Procedure of the Green Hydraulic System Downstream of the Engine Pump
AMM 29-10-00-200-002
Check Reservoir Air Pressure on Reservoir Gauge
AMM 29-10-00-200-008
Check Nitrogen Charge Pressure on Hydraulic Power Accumulators
AMM 29-11-00-710-001
Operational Test of the Green Hydraulic System
AMM 29-11-42-000-001
Removal of the Green Power Accumulator
AMM 29-11-42-400-001
Installation of the Green Power Accumulator
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
3. Fault Confirmation
Subtask 29-11-00-865-058-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUHYDRAULIC/LOW/LVL/IND1832GQN32
121VUHYDRAULIC/HYD/QTY/IND1831GQP35
121VUHYDRAULIC/G HYD/PUMP ENG1/MONG1702GKR34
Subtask 29-11-00-860-064-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, push the HYD pushbutton switch. Make sure that the HYD page is shown on the system display of the ECAM.
   (4) Do the operational test of the Green hydraulic system AMM 29-11-00-710-001.
   (5) Look for fault indications on the upper ECAM DU, the lower ECAM DU and panel 40VU.
4. Fault Isolation
Subtask 29-11-00-810-067-A
A. If the Fault Confirmation gives:

  • The content indication shows high fluid level on the lower ECAM DU,
    or
  • The content indication shows low fluid level on the lower ECAM DU,
    or
  • The content indication fluctuates between high and low fluid level on the lower ECAM DU after pressurization of the hydraulic system during the operational test,
    or the subsequent warnings come into view:
  • The HYD G ENG 1 PUMP LO PR on the upper ECAM DU,
  • The LO flag of the Green hydraulic system on the HYD page of the lower ECAM DU,
  • The Green ENG 1 PUMP P/BSW FAULT on panel 40VU,

  • Do a visual check of the fluid quantity shown on the mechanical indicator (1834GQ) on the ground service panel of the Green hydraulic system.
  • Do a visual check of the fluid quantity shown on the fluid content indicator of the Green reservoir.
  • Do a check of the pressure of the Green system accumulator (1070GM) AMM 29-10-00-200-008.
  • Do a check of the pressure of the Green hydraulic reservoir AMM 29-10-00-200-002.
   (1) If the three hydraulic fluid quantity indicators show the same quantity, the pressure of the reservoir is correct, but the accumulator pressure is less than the permitted tolerance:
     (a) Do a check for external gas leaks on the power accumulator and repair the defective components as necessary AMM 29-10-00-200-008.
     (b) If you find no external gas leaks, or the fault continues:
       1 Replace the HYD ACCU GREEN [1070GM] AMM 29-11-42-000-001 and AMM 29-11-42-400-001.
       2 Do the bleeding procedures of the Green hydraulic system AMM 29-00-00-870-001, AMM 29-00-00-870-002 and AMM 29-00-00-870-003.
Subtask 29-11-00-860-065-A
B. Do the procedure as given in Para. 3. B. to make sure that the operation of the hydraulic quantity indication is correct.
5. Close-up
Subtask 29-11-00-860-066-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 04:29:21 UTC
"WTRUIB" 2025