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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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For AOG assistance contact:

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Quick Links

09/25/19

Message Overview:

Fault Message:

L DED GEN 3PH CH A WRG/DGEN RNG

Fault Code:

7325624LBR

Associated CAS:

L FADEC FAIL
(Caution)

L FADEC FAULT
(Advisory)

Reporting LRU: Left Engine Electronic Controller (EEC)
System Description: 73-20-00
Schematic Diagram: None
Wiring Diagram: 71-50-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

An electrical fault has been detected with the Left Engine Dedicated Generator (DED GEN) 3 Phase to Engine Electronic Controller (EEC) CH A. Inhibited during Take-Off and Landing.

  • There is an open or short circuit or resistance error in the 3-Phase windings of the Dedicated Generator Stator
  • There is an open or short circuit in the interface wiring

Possible Causes:

  • Left Engine Dedicated Generator
  • Dedicated Generator Stator
  • Dedicated Generator Rotor
  • Left Engine Electronic Controller (EEC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • Service Bulletin (SB) BR700-73-101856 - Engine Fuel and Control - Dedicated Generator - Introduction of a new varnish for the windings of the Permanent Magnetic Alternator

Forum Articles/Infoservice/Newsletter:

NOTE: The dedicated generator circuits are monitored when the engine turns at more than 35% N2.

Quick Links:

Opening of the Cowls AMM 71-10-00-010-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of the Cowls AMM 71-10-00-410-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Deactivation of the Thrust Reverser (for Maintenance) AMM 78-30-00-040-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Activation of the Thrust Reverser (for Maintenance) AMM 78-30-00-440-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of FADEC System EMM 73-21-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Eng Electronic Controller (EEC)
Mod 73-101559		 EMM 73-21-01-000-801-B00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Eng Electronic Controller (EEC)
Mod 73-101559		 EMM 73-21-01-400-801-B001 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Dedicated Generator EMM 73-21-04-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Dedicated Generator EMM 73-21-04-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform a deactivation of the thrust reverser.
  2. Open the cowls.
  3. Perform wiring checks between the Left Engine Dedicated Generator (P1052) and the EEC 1 (P1043).

    1. If wiring checks are not good, repair defective wiring as required and go to step 10.
    2. If wiring checks are good, continue with next step.

  4. Perform the resistance checks for the Left dedicated generator stator as follow:

    From To Maximum Resistance Allowed Result
    P1052-1 P1052-2 0.64 Ohms
    P1052-1 P1052-3 0.64 Ohms
    P1052-2 P1052-3 0.64 Ohms

    1. If the resistance are not within range, go to step 8.
    2. If the resistance are within range, continue with next step.

  5. Perform an insulation check between the Left Engine Dedicated Generator (P1052) and the casing as follows:

    From To Maximum Resistance Allowed Result
    P1052-1 Case >40 MΩ
    P1052-2 Case >40 MΩ
    P1052-3 Case >40 MΩ

    1. If the insulation resistance is less than 40 MΩ, go to step 8.
    2. If the insulation resistance are within range, continue with next step.

  6. Examine the dedicated generator housing/stator for any sign of damage.

    1. If there is damage, replace the dedicated generator stator and go to step 10.
    2. If there is no damage, continue with next step.

  7. Examine the dedicated generator rotor for any sign of damage. Specifically look at heat discoloration and chaffing due to the stator damage.

    1. If there is damage, replace the dedicated generator rotor and go to step 10.
    2. If there is no damage, continue with next step.

  8. Replace the Left Dedicated Generator.

    1. If system checks are good, go to step 10.
    2. If fault remains, continue with next step.

  9. Replace the EEC 1.
  10. Close the cowls and activate thrust reverser.
  11. Do close out.
    Example of Rotor Condition:

    Damaged: Overheated and Fretting Sign

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