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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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07/19/19

Message Overview:

L AUX FUEL PUMP
(Advisory)

DDG Reference: 28-21-05
Pilot Action (QRH): FUEL 09-29
System Description: 28-21-00
Schematic Diagram: 28-21-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 28-21-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The left auxiliary (DC) pump is failed. The wing transfer function, from the failed side, is not available.

Possible Causes:

  • Throttle Quadrant Assembly (TQA) (AP41) L Engine RUN switch (1S1)
  • Fuel Management Quantity and Gauging Computer (FMQGC) (A47) racking
  • Left DC Auxiliary Pump (B10)
  • Left DC Auxiliary Pump Pressure Switch (S11)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-28-0368 - No Fault Found initiative: Fuel Management and Quantity Gauging Computer (FMQGC)
  • AW700-28-0469 - Fuel Management and Quantity Gauging Computer Tray Connector Inspection

Forum Articles/Infoservice/Newsletter: None

NOTE: If the Left Primary AC pumps and the Left DC Aux pumps are showing inoperative after engine shutdown, go to Troubleshooting Recommendations step 2.

Quick Links:

Access to CAIMS Active Faults AMM 45-45-00-970-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the FMQGC AMM 28-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the FMQGC AMM 28-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Throttle Quadrant AMM 76-10-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Throttle Quadrant AMM 76-10-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Access CAIMS Active Faults and select fault message from menu below:
  2. If the left primary AC pumps and the left DC Aux Pumps are showing inoperative after engine shutdown, continue with next step.
  3. With the LH FUEL CUTOFF switch in the OFF position, check for continuity to ground between FMQGC connector A47AP1 pin H12 and ground.

    1. If there is no continuity, continue with next step.
    2. If there is continuity, go to step 7.

  4. On the TQA, check for continuity of the LH FUEL CUTOFF switch (1S1) between connector A41J2 pins 38 and 46.

    1. If there is continuity, continue with next step.
    2. If there is no continuity, replace the TQA.

  5. Check for continuity between connector A41P2 pin 38 and airframe ground.

    1. If there is no continuity, check the ground stud or repair defective wiring as required.
    2. If there is continuity, continue with next step.

  6. Perform wiring checks between the FMQGC and the left Engine Fuel Cut-off switch and repair as required.
  7. Remove the FMQGC and re-rack the unit fully and perform a re-test of the system.
  8. Do close out.

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