background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults By CAIMS By Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

07/18/19

Message Overview:

FUEL UNIT MISMATCH
(Caution)

DDG Reference: None
Pilot Action (QRH): ABNORM 9-15
System Description: 28-41-00
Schematic Diagram: 28-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 28-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The FMQGC and EICAS are set to different units (KGS/LBS).

This troubleshooting sheet is for aircraft with Imperial units (LBS)

NOTE: Aircraft that have complied with SB 700-31-027 have Metric units (KGS).

Possible Causes:

  • Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
  • FMQGC wire strapping
  • Configuration Module wire strapping
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Forum Articles/Infoservice/Newsletter: None

NOTE: Ensure the correct wiring diagram is used when checking the wiring per the tables below in the troubleshooting recommendation. Some aircraft do not have TM221 (Pre SB 700-28-029) they have wire splices to join the wiring together. Also confirm that the aircraft being worked is either set to Metric units (KGS) or Imperial units (LBS) see SB 700-31-027.

Quick Links:

Removal of the Fuel Management and Quantity Gauging Computer (FMQGC) AMM 28-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Fuel Management and Quantity Gauging Computer (FMQGC) AMM 28-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform wiring checks (open circuit = failure) between the pins of the connectors that follow. Repair as required.
    NOTE: Aircraft incorporating SB 700-28-029 will have TM221 installed. Aircraft 9115 through 9158 will have TM221 installed at factory.

    CONNECTOR PIN PIN
    A47AP1 (FMQGC) B12 A15
    A47DP1 (FMQGC) K10 K15

    1. If the wiring checks are OK, then do close out.
    2. If the wiring checks are not OK then go to next step.

  2. Perform wiring checks (closed circuit = failure) between the pins of the connectors that follow. Repair as required.

    CONNECTOR PIN PIN
    A47AP1 (FMQGC) B12 B13
    A47AP1 (FMQGC) B12 A13
    A47DP1 (FMQGC) K10 K11
    A47DP1 (FMQGC) K10 K13

    1. If the wiring checks are OK then do close out.
    2. If wiring are not OK then go to next step.

  3. Suspect the fuel computer (FMQGC) (A47).
  4. Do close out.

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.