W DOC AIRBUS | TSM A320F

Yellow System Pressure Indication on ECAM DU out of Tolerance

TASK 29-13-00-810-810-A
Yellow System Pressure Indication on ECAM DU out of Tolerance

1. Possible Causes
  • internal leakage
  • PUMP VARIABLE DTS [3030GD]
  • HYDR. PRESSURE TRANSMITTER [3065GN]
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 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 29-00-00-280-003
Check of the Internal Leakage of the Yellow 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 29-13-51-000-003
Removal of the Yellow Engine Pump
AMM 29-13-51-000-004
Removal of the Yellow Engine Pump
AMM 29-13-51-000-806
Removal of the Yellow Engine Driven Pump
AMM 29-13-51-100-801
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-13-51-100-802
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-13-51-100-804
Cleaning of the Engine Pump Solenoid-Valve
AMM 29-13-51-400-003
Installation of the Yellow Engine Pump
AMM 29-13-51-400-004
Installation of the Yellow Engine Pump
AMM 29-13-51-400-806
Installation of the Yellow Engine Driven Pump
AMM 29-14-00-614-002
Pressurization of the Hydraulic Reservoirs through the Ground Connector
AMM 29-24-00-863-001
Pressurize the Yellow Hydraulic System with the Electric Pump
AMM 29-24-00-864-001
Depressurize the Yellow Hydraulic System
AMM 29-32-11-000-003
Removal of the Hydraulic Pressure Transducer
AMM 29-32-11-400-003
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 29-13-00-865-054-A
A. Make sure that this(these) circuit breaker(s) is(are) closed:
PANELDESIGNATIONFINLOCATION
** ON A/C ALL
121VUHYDRAULIC/SOL VALVES/G/Y/B/LEAK/TST1881GPN35
121VUHYDRAULIC/SOL VALVES/G/Y/PTU1801GLN34
121VUHYDRAULIC/Y HYD/PUMP ENG2/MONG3700GDQ37
121VUHYDRAULIC/Y HYD/PUMP ENG2/CTL3701GDQ36
Subtask 29-13-00-860-057-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 switch P/BSW. Make sure that the HYD page is shown on the lower Display Unit (DU) of the ECAM.
   (4) Make sure that the ECAM does not show any of these conditions;
  • Low air pressure in the Yellow reservoir
  • Low fluid level in the Yellow 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.
   (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 YELLOW/ENG 2 PUMP P/BSW is set to on. (FAULT and OFF lights are out).
Subtask 29-13-00-710-063-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 right (No. 2) engine AMM 71-00-00-710-001.
   (2) Look for the Yellow hydraulic system pressure indication on the lower ECAM DU.
Subtask 29-13-00-710-063-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 right (No. 2) engine AMM 71-00-00-710-001.
   (2) Look for the Yellow hydraulic system pressure indication on the lower ECAM DU.
Subtask 29-13-00-710-063-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 right (No. 2) engine AMM 71-00-00-720-809.
   (2) Look for the Yellow hydraulic system pressure indication on the lower ECAM DU.
4. Fault Isolation
Subtask 29-13-00-810-061-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/Y pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the right (No. 2) engine.
       2 Do a check of the internal leakage of the Yellow hydraulic system AMM 29-00-00-280-003 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Yellow hydraulic system with the electric pump AMM 29-24-00-863-001.
       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 Yellow hydraulic system AMM 29-24-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-100-801.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-000-003 and AMM 29-13-51-400-003.
       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 [3065GN] AMM 29-32-11-000-003 and AMM 29-32-11-400-003.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Yellow 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 29-13-00-810-061-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/Y pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the right (No. 2) engine.
       2 Do a check of the internal leakage of the Yellow hydraulic system AMM 29-00-00-280-003 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Yellow hydraulic system with the electric pump AMM 29-24-00-863-001.
       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 Yellow hydraulic system AMM 29-24-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-100-802.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-000-004 and AMM 29-13-51-400-004.
       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 [3065GN] AMM 29-32-11-000-003 and AMM 29-32-11-400-003.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Yellow 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 29-13-00-810-061-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/Y pushbutton switch to on (OFF light not on).
     (a) If the system pressure increases:
       1 Stop the dry-motoring of the right (No. 2) engine.
       2 Do a check of the internal leakage of the Yellow hydraulic system AMM 29-00-00-280-003 and do the necessary actions.
     (b) If the system pressure does not increase:
       1 Pressurize the Yellow hydraulic system with the electric pump AMM 29-24-00-863-001.
       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 Yellow hydraulic system AMM 29-24-00-864-001.
       2 Clean the Solenoid Valve of the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-100-804.
       3 Do the test given in Para. 3.
       4 If the fault continues:
       5 Replace the PUMP VARIABLE DTS [3030GD] AMM 29-13-51-000-806 and AMM 29-13-51-400-806.
       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 [3065GN] AMM 29-32-11-000-003 and AMM 29-32-11-400-003.
     (e) If the fault continues, obey the subsequent causes:
  • The internal leakage in the Yellow 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 29-13-00-710-064-A
B. Do the fault confirmation procedure as given in Para. 3. to make sure that operation is correct.
5. Close-up
Subtask 29-13-00-860-056-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 04:29:26 UTC
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