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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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Quick Links

07/16/19

Message Overview:

Fault Message:

FMQGC CH B ELECT PWR/WRG

Fault Code:

2844675PK

Associated CAS:

FUEL COMPUTR FAIL
(Caution)

FUEL COMPUTR FAULT
(Advisory)

Reporting LRU: Fuel Management and Quantity Gauging Computer (FMQGC)
System Description: 28-41-00
Schematic Diagram: 28-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 28-41-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Fuel Management and Quantity Gauging Computer (FMQGC) Channel B has an electrical power failure.

Possible Causes:

  • Secondary Power Distribution Assembly (SPDA) 3 (A15)
  • Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
  • Junction Box (JB6)
  • Auxiliary Power Unit (APU) Starter Contactor Assembly (ACSA) (A48)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Loss of 28 VDC power source to the FMQGC CH B will set the FMQGS COMPUTER/WRG FAULT, FMQGS COMPUTER CH B LMS/WRG FAULT CAIMS messages, and the FUEL COMPUTR FAULT CAS messages. In addition, if the lost of power is caused by an SPDA 3 internal failure, the SPDA 3 FAILED CAIMS message will also be set.

Quick Links:

Removal of the Junction Box JB6 AMM 24-00-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB6 AMM 24-00-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Junction Box JB6 Circuit-Cards AMM 24-00-14-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB6 Circuit-Cards AMM 24-00-14-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Secondary-Power Distribution Assemblies AMM 24-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Secondary-Power Distribution Assemblies AMM 24-62-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the APU Starter-Contactor Assembly AMM 24-62-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the APU Starter-Contactor Assembly AMM 24-62-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Computer AMM 28-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Computer AMM 28-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Determine which FMQGC power source failed:

    1. If SPDA 3, when FMQGC is powered by selecting DC or AC power On in the cockpit, continue with next step.
    2. If ASCA, when the FMQGC is powered by turning ON the internal or external RDCP, go to step 6.

  2. On the EMS CDU, reset FMQGC CH B circuit breaker.

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

  3. Using CAIMS, verify if the SPDA 3 FAILED (LEVEL A) fault message is displayed:

    1. If YES, continue with next step.
    2. If NO, go to step 6.

  4. Swap SPDA 3 with SPDA 4.

    1. If system checks are good, replace SPDA 3 and do close out.
    2. If fault remains, continue with next step.

  5. Perform wiring checks between FMQGC (A47FP1) and SPDA 3 (A15P3).

    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.

  6. On the EMS CDU, reset FUEL R/D CH B circuit breaker.

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

  7. Using CAIMS, verify if messages concerning the ASCA are displayed:

    1. If YES, troubleshoot them first.
    2. If NO, continue with next step.

  8. For 93 Pin Test Point Connector, perform wiring checks via TP-31,TP-56,TP-59,TP-61 between JB6/PCB3/K5, APU starter-contactor assembly (A48P1) and FMQGC (A47CP1)/(A47FP1).

    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.

  9. For 96 Pin Test Point Connector, perform wiring checks via TP-58,TP-61,TP-62,TP-63 between JB6/PCB3/K5, APU starter-contactor assembly (A48P1) and FMQGC (A47CP1)/(A47FP1).

    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.

  10. Replace FMQGC.
  11. Do close out.

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