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Troubleshooting
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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:

R PRI FUEL PUMPS
(Caution)

DDG Reference: 28-21-00
Pilot Action (QRH): ABNORM 8-15
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:

Both forward and aft PRI (AC) pumps on the right side have failed.

Possible Causes:

  • AC Power Center (ACPC) Solid State Power Controller (SSPC) 8
  • ACPC SSPC 10
  • Throttle Quadrant Assembly (TQA) (AP41)
  • R Engine RUN Switch (2S1)
  • Fuel Management and Quantity Gauging Computer (FMQGC) (A47)
  • Right Fwd AC Boost Pump (B22)
  • Right Aft AC Boost Pump (B23)
  • Right Fwd AC Boost Pump Pressure Switch (S15)
  • Right Aft AC Boost Pump Pressure Switch (S16)
  • 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 Right Primary AC pumps and the Right 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 displayed message from menu below:
  2. If the right primary AC pumps and the right DC aux pums are showing inoperative after engine shutdown, continue with next step
  3. With the RH FUEL CUTOFF switch in the OFF position, check for continuity to ground between FMQGC connector A47DP1 pin F15 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 RH FUEL CUTOFF switch (2S1) between connector A41J3 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 A41P3 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 right Engine Fuel Cutoff switch and repair as required
  7. Remove the FMQGC and rerack the unit fully and perform a re-test of the system.
  8. Access the ACPC logic assembly.Swap SSPC 8 (R Fwd Pri Pump) with SSPC 4 (spare card). Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, replace defective SSPC card.

  9. Swap SSPC 10 (L Aft Pri Pump) with SSPC 4 (spare card). Is the fault still present?

    1. If YES, continue with next step.
    2. If NO, replace defective SSPC card.

  10. Contact the Bombardier Customer Response Center for further troubleshooting.
  11. Do close out.

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