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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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07/09/25

Message Overview:

Message Name:

LH RECIRC SOV/WRG

Message Code:

2844641PK

Associated CAS:

L FUEL RECIRC FAIL
(Caution)

Reporting LRU: Fuel Management and Quantity Gauging Computer (FMQGC)
System Description: 28-26-00 - Thermal Management System
Schematic Diagram: 28-26-00 [ Global Express ]  [ G5000 ]  [ Global XRS ] - Thermal Management System
Wiring Diagram: 28-26-01 [ Global Express ]  [ G5000 ]  [ Global XRS ] - Thermal Management Recirculation System

Message Description:

L RECIRCULATION VALVE#1/WRG FAULT shows on the CAIMS PMAT when the Conditions that follow occur:

  • The Left Fuel Return-To-Tank (FRTT) Shutoff-Valve is commanded open
  • The Left FRTT Shutoff-Valve indication is closed

OR

  • The Left FRTT Shutoff-Valve is commanded closed
  • The Left FRTT Shutoff-Valve indication is open

Possible Causes:

  • Left Fuel Return To Tank (FRTT) Shutoff Valve
  • Fuel Control Panel (AP5)
  • Fuel Management Quantity and Gauging Computer (FMQGC) (A47)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: 

  • SB700-28-039 - Modification - Distribution - Permanent Wiring Configuration For The Fuel Re-Circulation System Following Power Source Change
  • SB700-28-045 - Modification - Fuel Management And Quantity Gauging System (FMQGS) - Upgrade Of The FMQGS Computer To Part No. GP546-1501-9

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None 

Quick Links:

Standard Aircraft Configuration for Maintenance [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM12-00-00-867-801
Connect Electrical Power to the Aircraft [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-861-801
Electrical/Electronic Safety Precautions [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM24-00-00-910-801
Removal of the FUEL Control Panel [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-20-01-000-801
Installation of the FUEL Control Panel [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-20-01-400-801
Removal of the Fuel Return-To-Tank (FRTT) Check Valve [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-26-00-000-801
Installation of the Fuel Return-To-Tank (FRTT) Check Valve [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-26-00-400-801
Removal of the Computer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-41-01-000-801
Installation of the Computer [ G5000 ]  [ Global Express ]  [ Global XRS ] AMM28-41-01-400-801

Troubleshooting Recommendations:

  1. Access CAIMS and select SYSTEM DIAG, ATA 28, FMQGC CH. A(B), LRU TEST. Make a selection of RECIRCULATION VALVES DATA. Look at the status of the left Recirc Valve. You can use that page to Open/Close the valves and see if the status changes.

    1. If the Valve status changes, go to step 6.
    2. If the Valve status does not change, continue with next step.

  2. Re-rack the FMQGC. Is the fault still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  3. Access FMQGC connector A47AP1. Disconnect Left Engine FRTT Valve connector P735. Perform a continuity check as follows:

    From To Result
    P735-1 Ground
    P735-1 Ground
    P735-1 Ground

    1. If there is no continuity, repair defective wiring as required and do close out.
    2. If there is continuity, continue with next step.

  4. Perform a continuity check as follows:

    From To Result
    P735-5 Ground

    1. If there is continuity, repair defective wiring as required and do close out.
    2. If there is no continuity, continue with next step.

  5. Perform a continuity check as follows:

    From To Result
    P735-5 A47AP1-J10

    1. If there is continuity, replace the Left Engine FRTT Valve and do close out.
    2. If there is no continuity, repair defective wiring as required and do close out.

  6. Access FMQGC connector A47AP1. Disconnect Fuel Control Panel connector AP5P1. Perform a continuity check as follows:

    From To Result
    A47AP1-J11 Ground

    1. If there is continuity, repair defective wiring as required and do close out.
    2. If there is no continuity, continue with next step.

  7. Perform a continuity check as follows:

    From To Result
    A47AP1-J11 AP5P1-26
    AP5P1-15 Ground

    1. If there is no continuity, repair defective wiring as required and do close out.
    2. If there is continuity, continue with next step.

  8. Make sure the L RECIRC INHIBIT PBA on the Fuel Control Panel is set to ON or AUTO post SB 700-28-045. On the Fuel Control Panel directly, perform a continuity check as follows:

    From To Result
    AP5J1-26 AP5J1-15

    1. If there is continuity, go to step 10.
    2. If there is no continuity, continue with next step.

  9. Make sure the L RECIRC INHIBIT PBA on the Fuel Control Panel is set to OFF. Repeat the same continuity check as in step 8.

    1. If there is continuity, go to step 11.
    2. If there is no continuity, continue with next step.

  10. Replace the Fuel Control Panel.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  11. Replace the FMQGC.
  12. Do close out.

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