W DOC AIRBUS | TSM A320F

Journal Oil Shuttle Valve Stuck in Main Position

TASK 79-21-00-810-822-A
Journal Oil Shuttle Valve Stuck in Main Position

1. Possible Causes
  • VARIABLE OIL FLOW REDUCTION VALVE [4069KS]
  • SENSOR-PRESSURE, AUXILIARY OIL [4070KS]
  • SENSOR-PRESSURE, MAIN OIL [4071KS]
  • PROGNOSTICS AND HEALTH MANAGEMENT UNIT [4609KS]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 71-00-00-810-834-A
General Troubleshooting Guidelines for Additional Troubleshooting Information
TSM TASK 71-00-00-810-835-A
Component and Harness Intermittent Troubleshooting Procedure for Guidance Troubleshooting Intermittent Faults
AMM 71-00-00-860-814
Shutdown of the Engine
AMM 71-00-00-860-822
Start the Engine (Normal Manual Start)
AMM 71-00-00-860-823
Start the Engine (Normal Automatic Start)
AMM 77-31-01-000-801
Removal of the Prognostics and Health Management Unit (PHMU)
AMM 77-31-01-400-801
Installation of the Prognostics and Health Management Unit (PHMU)
AMM 78-36-00-010-802
Opening of the Thrust Reverser Cowl-Doors
AMM 78-36-00-410-802
Closing of the Thrust Reverser Cowl-Doors
AMM 79-21-15-000-801
Removal of the Variable Oil Reduction Valve (VORV)
AMM 79-21-15-400-801
Installation of the Variable Oil Reduction Valve (VORV)
AMM 79-33-21-000-801
Removal of the Main Oil Pressure (MOP) Sensor
AMM 79-33-21-400-801
Installation of the Main Oil Pressure (MOP) Sensor
AMM 79-33-24-000-801
Removal of the Auxiliary Oil Pressure (AOP) Sensor
AMM 79-33-24-400-801
Installation of the Auxiliary Oil Pressure (AOP) Sensor
F VORV Wiring Harness
F Auxiliary Oil Pressure Sensor Wiring Harness
F Main Oil Pressure Sensor Wiring Harness
3. Fault Confirmation
Subtask 79-21-00-710-070-A ** ON A/C NOT FOR ALL
A. Do an engine run to idle to confirm repair of this fault AMM 71-00-00-860-822 or AMM 71-00-00-860-823.
   (1) Shutdown the engine AMM 71-00-00-860-814.
   (2) On MCDU screen, check if the fault is displayed on ground scanning report.
NOTE: The Electronic Engine Control (EEC) has reported the journal oil shuttle valve has failed in the open position. The journal oil shuttle valve is part of the Variable Oil Reduction Valve (VORV) and is mounted on the oil control module, located at the 9 o'clock position.
4. Fault Isolation
WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE AND ENGINE OIL CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
WARNING: REFER TO THE MSDS FOR ALL MATERIAL USED AND THE MANUFACTURER'S SAFETY INSTRUCTIONS FOR ALL EQUIPMENT USED. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.
CAUTION: MAKE SURE YOU REMOVE ELECTRICAL POWER FROM THE EEC BEFORE YOU REMOVE THE ELECTRICAL CONNECTORS. IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.
Subtask 79-21-00-810-074-A ** ON A/C NOT FOR ALL
A. If there is confirmation of the fault:
   (1) Open the thrust reverser cowl-doors AMM 78-36-00-010-802.
   (2) Replace VARIABLE OIL FLOW REDUCTION VALVE [4069KS] AMM 79-21-15-000-801 and AMM 79-21-15-400-801.
     (a) Do the test given in Para. 3.
   (3) If the fault continues:
     (a) Replace SENSOR-PRESSURE, AUXILIARY OIL [4070KS] AMM 79-33-24-000-801 and AMM 79-33-24-400-801.
     (b) Do the test given in Para. 3.
   (4) If the fault continues:
     (a) Replace SENSOR-PRESSURE, MAIN OIL [4071KS] AMM 79-33-21-000-801 and AMM 79-33-21-400-801.
     (b) Do the test given in Para. 3.
   (5) If the fault continues:
     (a) Replace the PROGNOSTICS AND HEALTH MANAGEMENT UNIT [4609KS] AMM 77-31-01-000-801 and AMM 77-31-01-400-801.
     (b) Do the test given in Para. 3.
5. Close-up
Subtask 79-21-00-860-063-A ** ON A/C NOT FOR ALL
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.
     (a) Close the thrust reverser cowl-doors AMM 78-36-00-410-802.
[Rev.8 from Aug 2018] 2026.04.04 04:40:46 UTC
"AVIABRAIN" 2025