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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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03/13/26

Message Overview:

Message Name:

FAULT

Message Code:

B3-007769

Associated CAS:

R GEN FAIL
(Caution)

Reporting LRU: RIGHT GENERATOR
System Description: 24-31-00 - Primary DC Power System
24-61-00 - DC Power Center (DCPC)
Schematic Diagram: SSM 24-31-00-101 - Primary DC-Power System
SSM 24-61-00-101 - DC Power Center (DCPC) System
Wiring Diagram: 24-31-07 - Main Generator (Right) - ALL
24-31-15 - Generator Control Unit (GCU) Right - ALL
24-61-03 - DC Power Center (DCPC) Right - 20501 TO 20960

Message Description:

The Right Generator Power Module (RGPM) has failed.

Possible Causes:

  • Right Generator Power Module (RGPM) (PCB8)
  • Right Generator (RGEN) (G2)
  • Right Generator Control Unit (RGCU) (PCB6)
  • Right DC Power Center (RDCPC) (A36)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW300-24-0013 - Loss of Normal Electrical Power
  • AW300-24-0038 - Nuisance "ELECTRICAL FAULT" CAS Message Upon Engine or APU Shut Down.
  • AW300-24-0115 - Introduction of Improved Generator P/N A3579-102
  • AW300-24-0132 - Power Module (PMOD) P/N R3608-011 - Generator Failures at High Engine Speed
  • AW300-24-0137 - Y06 Electrical System Upgrade
  • AW300-24-0162 - Service Bulletin 100-24-20 - DC Power Center (DCPC) System - Inspection and Replacement of Internal Fuses in the L/H and R/H DC Power Center (DCPC)

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

Quick Links:

General Setup for Maintenance
Standard Aircraft Configuration for Maintenance AMM 12-00-00-867-803
Connect Electrical Power to the Aircraft AMM 24-00-00-861-801
Remove Electrical Power from the Aircraft AMM 24-00-00-861-802
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801
Electrostatic Discharge Safety Precautions AMM 24-00-00-910-802
Maintenance Tasks
Removal of the Main Generator AMM 24-31-05-000-801
Installation of the Main Generator AMM 24-31-05-400-801
Removal of the Generator Control Unit (GCU) - Primary AMM 24-31-13-000-801
Installation of the Generator Control Unit (GCU) - primary AMM 24-31-13-400-801
Removal of the Generator Power Module AMM 24-31-21-000-801
Installation of the Generator Power Module AMM 24-31-21-400-801
Removal of the DC Power Center (DCPC) AMM 24-61-01-000-801
Installation of the DC Power Center (DCPC) AMM 24-61-01-400-801

Troubleshooting Recommendations:

  1. Inspect the Generator Cooling Inlet and Outlet on the engine cowling for obstruction or debris.
  2. Verify that the Generator electrical connections are secured and in good condition.
  3. Interchange the Right Generator Power Module (PCB8) with the Left Generator Power Module (PCB7). Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, replace the defective Generator Power Module.

  4. Interchange the Right Generator Control Unit (PCB6) with the Left Generator Control Unit (PCB5). Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, replace the defective Generator Control Unit.

  5. Do wiring check of the following wires:

    From To Results
    R GEN conn. G2P1 - pin L R DCPC conn. A36P1 - pin JJ
    R GEN conn. G2P1 - pin M R DCPC conn. A36P1 - pin z
    R GEN conn. G2P1 - pin H R DCPC conn. A36P1 - pin D
    R GEN conn. G2P1 - pin J R DCPC conn. A36P1 - pin d
    R GEN conn. G2P1 - pin K R DCPC conn. A36P1 - pin E

    1. If wiring check is satisfying, continue with next step.
    2. If wiring check is not satisfying, repair the defective wire.

  6. Interchange the Right Generator (G2) with the Left Generator (G1). Is the fault message still present?

    1. If YES, continue with next step.
    2. If NO, replace the defective Generator.

  7. Replace Right DC Power Center (A36).
  8. Do close-out.

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