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:

Fault Message:

None

Fault Code:

28200843

Associated CAS:

CTR XFER FAULT
(Advisory)

Reporting LRU: Fuel Management and Quantity Gauging Computer (FMQGC)
System Description: 28-22-00
Schematic Diagram: 28-22-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
28-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 28-20-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]
28-22-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
28-41-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

When the conditions that follow occur:

  • Left or Right Center Transfer Pump is commanded ON, but it is failed OFF and the pump is covered in fuel.
  • Left or Right wing quantity is less than 50% full and the on side pump is inoperative when the center tank is not empty.

Possible Causes:

  • Portable Maintenance Access Terminal (PMAT)
  • Fuel Management Quantity and Gauging Computer (FMQGC) (A47)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Forum Articles/Infoservice/Newsletter: None

NOTE: Wings need to be filled above 50% and the center tank filled to at least 1000 lbs. before proceeding with any of the following.

  1. In CAIMS go to:

    1. System Diagnostics
    2. Chapter 28-00 Fuel
    3. Computer (FMQGC Channel A or B)
    4. LRU test
    5. Center Transfer Channel A or B
    6. Turn on/off left than right pump to verify pump operation.
    7. If both pumps operate, exit CAIMS and proceed to next step.

  2. Apply External Power.

    1. In Flight compartment on the APU Control Panel make sure switch is in the off position.
    2. On the throttle quadrant, put the Left and Right Engine Run switches to on.
    3. Make sure you see the following indication:

      • Center Tank L/R XFER Pump
      • Green L/R Transfer Line - Green

    4. Transfer will cease at approximately 250lbs.

Quick Links:

Operational Test of the Center Transfer Pumps AMM 28-22-00-710-802 [ 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 ]
Removal of the Portable Maintenance-Access Terminal (PMAT) AMM 45-45-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Portable Maintenance-Access Terminal (PMAT) AMM 45-45-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Is the Left or Right wing quantity less than 50% full when the on side pump failed and the center tank is not empty?

    1. If YES, re-distribute wing/center tank fuel load.
    2. If NO, continue with next step.

  2. Is CAS message gone?

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

  3. Refer to AW 700-28-0072 to determine if the failure is a known issue.

    1. If YES, follow instructions of AW700-28-0072 and continue with next step.
    2. If NO, go to step 5.

  4. Perform operation test of center transfer pumps. Is test passed?

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

  5. Replace FMQGC.

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

  6. Perform a wiring checks between FMQGC and PMAT.

    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.

  7. Replace PMAT.

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

  8. Troubleshooting using CAIMS message.
  9. Do close out.

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