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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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05/12/22

Message Overview:

AFT XFER FAIL
(Caution)

DDG Reference: 28-22-03
Pilot Action (QRH): ABNORM 9-4
System Description: 28-22-00
Schematic Diagram: 28-22-00  [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 28-22-01  [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

When the conditions that follow occur and aircraft is not in a take-off or landing mode:

  • AFT XFER switch on the FUEL control panel is set to ON or to AUTO and the aft transfer is commanded on.
  • Left aft transfer pump pressure indication is low or the left aft transfer shutoff valve indication is closed.
  • Right aft transfer pump pressure indication is low or the right aft transfer shut-off valve indication is closed.
  • There is more than 100 lbs (45 kgs) of fuel in the aft tank.

Possible Causes:

  • Left Aft Transfer Pump (B34)
  • Right Aft Transfer Pump (B35)
  • Left Aft Transfer Pump Pressure Switch (S22)
  • Right Aft Transfer Pump Pressure Switch (S23)
  • Left Aft Transfer Shut-off Valve (L36)
  • Right Aft Transfer Shut-off Valve (L37)
  • FUEL Control Panel (AP5)
  • ACPC/SPDA/EMS
  • Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

AW700-28-0496 - Fuel Quantity Indication Fluctuation

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Aft Transfer Pumps AMM 28-22-25-000-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Installation of the Aft Transfer Pumps AMM 28-22-25-400-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Removal of the Aft Transfer Pump Pressure Switch AMM 28-22-29-000-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Installation of the Aft Transfer Pump Pressure Switch AMM 28-22-29-400-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Removal of the Aft Transfer Shutoff Valves AMM 28-22-33-000-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Installation of the Aft Transfer Shutoff Valves AMM 28-22-33-400-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Removal of the FMQGC AMM 28-41-01-000-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Installation of the FMQGC AMM 28-41-01-400-801 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10-02 [ Global Express ]  [ Global 5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. If reporting LRU for this CAS message displayed in RED on the PMAT, select "No available CAIMS message" in the dropdown list.
  2. If no associated ACTIVE FAULT is displayed on the PMAT, select "No available CAIMS message" in the dropdown list.

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