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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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Quick Links

09/25/19

Message Overview:

Fault Message:

L DED GEN IOP CH A WRG/DGEN RNG

Fault Code:

7325626LBR

Associated CAS:

L FADEC FAIL
(Caution)

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:

There is an open or short circuit or resistance error in the single phase windings of the Dedicated Generator Stator or there is an open or short circuit in the interface wiring.

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

Possible Causes:

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

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

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 ]
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 wiring checks between the Left Engine Dedicated Generator and Left EEC.

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  2. Perform the resistance checks of the dedicated generator stator as follow:

    From To Maximum Resistance allowed Result
    J1052-1 J1052-2 0.64 Ohms
    J1052-1 J1052-3 0.64 Ohms
    J1052-2 J1052-3 0.64 Ohms
    J1052-4 J1052-5 1.26 Ohms

    1. If the resistance is not as specified above, go to step 9.
    2. If the resistance is as specified above, continue with next step.

  3. Perform an insulation check for the dedicated generator stator insulation resistance between connector J1052 and casing as follows:

    From To Maximum Resistance allowed Result
    J1052-4 case >40 MΩ

    1. If the insulation resistance is less than 40 MΩ, go to step 9.
    2. If the insulation resistance is as specified above, continue with next step.

  4. Visually inspect the dedicated generator for pickup, fretting, axial scratches, circumferential scratches, grooves and cracks.

    1. If there is damage, go to step 9.
    2. If there is no damage, continue with next step.

  5. Visually inspect the Stator Housing for nicks, scratches, or other damage at surface that will be against engine gearbox, cracks at mounting holes, all O-ring and other sealing areas for damage that would prevent a correct seal and chromate coating at mounting flange for signs of wear.

    1. If there is damage, go to step 9.
    2. If there is no damage, continue with next step.

  6. Visually inspect the Stator Assembly for stator laminations for broken or missing teeth or pieces, also no laminations are allowed to come out into the hole where the rotor will go (no laminations are allowed to protrude above the tooth into center near rotor), lifted laminations (refer to REPAIR). Make sure that the rotor has not rubbed against the stator during operation.

    1. If there is damage, go to step 9.
    2. If there is no damage, continue with next step.

  7. Visually inspect the windings in stator housing for corrosion or contamination, damaged stator windings, loose/defective wire connections, nicks or cuts, damaged or worn wire insulation, damaged or worn sleeving and signs of arcing or electrical failure.

    1. If there is damage, go to step 9.
    2. If there is no damage, continue with next step.

  8. Visually inspect connectors for stripped or worn threads, damaged keyways, pins that are loose, bent, burnt, corroded, or damaged, contamination between pins or damaged center insulator and signs of arcing or electrical failure.

    1. If there is no damage, do close out.
    2. If there is damage, continue with next step.

  9. Replace Left Engine Dedicated Generator.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  10. Replace EEC 1.
  11. Do close out.

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