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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

10/07/19

Message Overview:

Fault Message:

L N2 SPEED CH A WRG/PROBE RNG

Fault Code:

7326228LBR

Associated CAS:

L FADEC FAIL
(Caution)

Reporting LRU: Left Engine Electronic Controller (EEC)
System Description: 77-30-00
Schematic Diagram: None
Wiring Diagram: 71-50-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Engine Electronic Controller (EEC) senses that the signal from the N2 Speed Probe of channel A is out of limits. During engine operation the speed probe circuits are continuously monitored by the Full-Authority Digital Engine-Controller (FADEC). There are three speed probe inputs to the EEC: Channel A, Channel B and Shared. The output from the N2 Speed Probe shared can be changed with the output from the N2 Speed Probe of channel A to let the aircraft be serviceable.

Possible Causes:

  • N2 Speed Probe Channel A
  • Left Engine Electronic Controller (EEC)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Engine Safety Precautions AMM 71-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
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 ]
Removal of the Engine Electronic Controller (EEC) EMM 73-21-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Electronic Controller (EEC) EMM 73-21-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the N2 Speed Probes EMM 77-12-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the N2 Speed Probes EMM 77-12-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect electrical power to the aircraft.
  2. Open the following circuit breakers:

    System Name Circuit Breaker Name Bus Name
    ENGINE L ENG FUEL HPSOV BATT
    ENGINE L ENG IGN 1 BATT
    ENGINE L ENG IGN 2 BATT
    ENGINE L ENG START A BATT
    ENGINE L ENG START B BATT
    ENGINE L FADEC CH A BATT
    ENGINE L FADEC CH B BATT

  3. Perform a deactivation of the thrust reverser and open the cowls.
  4. Perform a visual inspection of the interface for damage between the connectors Left EEC connector (P1043) and N2 speed-probe-connector (P1074).

    1. If any damage is found, repair defective wiring as required and go to step 14.
    2. If no damage is found, monitor the system to see if the fault message occurs again and continue with next step.

  5. Close the cowls and activate the thrust reverser.
  6. Close the following circuit breakers:

    System Name Circuit Breaker Name Bus Name
    ENGINE L ENG FUEL HPSOV BATT
    ENGINE L ENG IGN 1 BATT
    ENGINE L ENG IGN 2 BATT
    ENGINE L ENG START A BATT
    ENGINE L ENG START B BATT
    ENGINE L FADEC CH A BATT
    ENGINE L FADEC CH B BATT

  7. Check for the fault message L N2 SPEED CH A WRG/PROBE RNG.

    1. If the fault message is not active, do close out.
    2. If the fault message stays active, continue with next step.

  8. Replace N2 Speed-Probe.

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

  9. Open the circuit breakers that follow:

    System Name Circuit Breaker Name Bus Name
    ENGINE L ENG FUEL HPSOV BATT
    ENGINE L ENG IGN 1 BATT
    ENGINE L ENG IGN 2 BATT
    ENGINE L ENG START A BATT
    ENGINE L ENG START B BATT
    ENGINE L FADEC CH A BATT
    ENGINE L FADEC CH B BATT

  10. Perform a deactivation of the thrust reverser and open the cowls.
  11. Disconnect the Left EEC connector (P1043) and the N2 speed-probe-connector (P1074).
  12. Perform wiring checks between the connectors Left EEC connector (P1043) and N2 speed-probe-connector (P1074).

    1. If wiring checks are not good, repair defective wiring as required and go to step 14.
    2. If wiring checks are good, continue with next step.

  13. Connect the Left EEC connector (P1043) and the N2 speed-probe-connector (P1074).
  14. Close the cowls and activate the thrust reverser.
  15. Close the following circuit breakers:

    System Name Circuit Breaker Name Bus Name
    ENGINE L ENG FUEL HPSOV BATT
    ENGINE L ENG IGN 1 BATT
    ENGINE L ENG IGN 2 BATT
    ENGINE L ENG START A BATT
    ENGINE L ENG START B BATT
    ENGINE L FADEC CH A BATT
    ENGINE L FADEC CH B BATT

  16. Connect electrical power to the aircraft.
  17. Make sure that L (R) FADEC FAIL (Caution) does not show on the EICAS display.

    1. If CAS message not show on the EICAS display, do close out.
    2. If CAS message show on the EICAS display, continue with next step.

  18. Troubleshoot L (R) FADEC FAIL (Caution) CAS Message.
  19. Do close out.

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