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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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09/28/19

Message Overview:

Fault Message:

L VSV CH A FMU[VSV TM]NULL SHIFT MA

Fault Code:

7326628LBR

Associated CAS:

None

Reporting LRU: Fuel Metering Unit (FMU)
System Description: 73-20-00
Schematic Diagram: None
Wiring Diagram: 71-50-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

This message shows when:

  • There is an error of resistance in the Variable Stator Vane Torque Motor of the Fuel Metering Unit (FMU) for channel A
  • There is an open circuit or a short circuit in the interface wiring

This condition is set by null current shift checks. The FMU circuits are continuously monitored by the Full-Authority Digital Engine-Controller (FADEC).

Possible Causes:

  • Fuel Metering Unit (FMU)
  • Left Engine Electronic Controller (EEC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Engine Safety Precautions AMM 71-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Opening of the Cowls AMM 71-10-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of the Cowls AMM 71-10-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Deactivation of the Thrust Reverser (for Maintenance) AMM 78-30-00-040-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Activation of the Thrust Reverser (for Maintenance) AMM 78-30-00-440-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Fuel Metering Unit (FMU) EMM 73-21-03-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Fuel Metering Unit (FMU) EMM 73-21-03-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

CAUTION: DO NOT DO ELECTRICAL CHECKS INTO THE ENGINE ELECTRONIC CONTROLLER (EEC). IF YOU DO NOT OBEY THIS INSTRUCTION, DAMAGE TO THE EEC CAN OCCUR.

  1. Perform wiring checks between FMU connector (P1049) and EEC connector (P1044).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  2. Replace FMU.
  3. Do close out.

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