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Select color for CAS message that you wish to troubleshoot

(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

06/24/24

Message Overview:

L ENGINE FAULT
(Advisory)

DDG Reference: None
Pilot Action (QRH): ENG 05-24
System Description: 76-11-00
Schematic Diagram: 76-11-00
77-10-00
73-21-00
77-31-00
78-30-00
Wiring Diagram: 73-31-01
77-40-01

Message Description:

The cyan 'L ENGINE FAULT' advisory CAS message indicates a fault has been detected in the respective engine.

Engine control system functional failure that may prevent dispatch after next landing and has no impact on continued safe flight.

This CAS message is also generated by the avionics if no data is received from both FADEC channels.

Possible Causes:

  • Left Eng Broken Shaft Detector fault 4
  • Left Eng hydraulic bypass solenoid fault 4
  • Left Eng hydraulic bypass solenoid fault 5
  • Left Eng hydraulic bypass solenoid fault 6
  • Left Eng hydraulic bypass solenoid fault 7
  • Left Eng A/C identification fault 4 (CFG Pin A)
  • Left Eng A/C identification fault 4 (CFG Pin B)
  • Left Eng fuel temperature/impending bypass fault 4
  • Left eng fuel system HMU fault 4
  • Left Eng N1 compensator fault 4
  • Left Eng N1 compensator fault 5
  • Left Eng N2 monopole fault 4
  • Left Eng P3 tubing fault 4
  • Left Eng PMA fault 4
  • A/C ARINC system fault to left engine
  • Left Eng - R IOC ARINC input is missing to FADEC Ch A (ARI-1 port)
  • Left Eng - R IOC ARINC input is missing to FADEC Ch B (ARI-1 port)
  • Left Eng - L IOC ARINC input is missing to FADEC Ch A (ARI-3 port)
  • Left Eng - L IOC ARINC input is missing to FADEC Ch B (ARI-3 port)
  • Left Eng T/R EHPL fault 5
  • Left Eng T/R ICU fault 9
  • Left Eng T/R ICU fault 10
  • Left Eng T/R multiplexer fault 4
  • Left Eng T/R lower deploy switch fault 4
  • Left Eng T/R upper deploy switch fault 4
  • Left Eng T/R lower left door hook/latch fault
  • Left Eng T/R lower right door hook/latch fault
  • Left Eng T/R upper left door hook/latch fault
  • Left Eng T/R upper right door hook/latch fault
  • Left Eng T/R lower left stow switch fault 4
  • Left Eng T/R lower right stow switch fault 4
  • Left Eng T/R upper left stow switch fault 4
  • Left Eng T/R upper right stow switch fault 4

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum/Infoservice/Newsletter: None

NOTES:

  • If all or any combination of the following CAS are posted at the same time Troubleshoot the PROX SYS Fault (Advisory) first.
    PROX SYS FAULT (ADVISORY)
    STAB TRIM FAULT (ADVISORY)
    SPOILERS FAULT (ADVISORY)
    L ENGINE FAULT (ADVISORY)
    R ENGINE FAULT (ADVISORY)

Quick Links:

Operational Test of the Pivot-Door Actuator Internal-Lock AMM 78-32-00-710-801
Operational Test of the Electro-Hydraulic Lock Assembly AMM 78-32-00-710-802
Detailed Inspection of the S Hook Assemblies AMM 78-32-00-220-801
Detailed Inspection of the Pivot Door Hooks AMM 78-32-00-220-802
Detailed Inspection of the Pivot Door Actuators and Attachment Hardware AMM 78-32-00-220-803
Detailed Inspection of the Electro-Hydraulic Lock Assembly AMM 78-32-00-220-804
Detailed Inspection of the Hydraulic Lock Assembly AMM 78-32-00-220-805
Removal of the Thrust-Reverser Directional Control-Unit AMM 78-32-01-000-801
Installation of the Thrust-Reverser Directional Control-Unit> AMM 78-32-01-400-801
Removal of the Thrust-Reverser Pivot Doors Actuators AMM 78-32-02-000-801
Installation of the Thrust-Reverser Pivot Doors Actuators AMM 78-32-02-400-801
Removal of the Thrust-Reverser Hydraulic Primary-Lock AMM 78-32-05-000-801
Installation of the Thrust-Reverser Hydraulic Primary-Lock AMM 78-32-05-400-801
Removal of the Thrust-Reverser Electro-Hydraulic Primary-Lock AMM 78-32-06-000-801
Installation of the Thrust-Reverser Electro-Hydraulic Primary-Lock AMM 78-32-06-400-801
Functional Test of the Thrust-Reverser Electro-Hydraulic Primary-Lock AMM 78-32-06-720-801
Removal of the Thrust-Reverser Isolation Control-Unit (ICU) AMM 78-32-07-000-801
Installation of the Thrust-Reverser Isolation Control-Unit (ICU) AMM 78-32-07-400-801
Removal of the Engine Electronic Control Unit (ECU) AMM 76-10-05-000-801
Installation of the Engine Electronic Control Unit (ECU) AMM 76-10-05-400-801
Wiring - Maintenance Practices - ALL SPM 20-12-00-02
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02
Electrical Connectors - Maintenance Practice - ALL SPM 20-20-00-02

Troubleshooting Recommendations:

  1. Interrogate the MDC as follows:

    1. On the cursor control panel, ensure the toggle switch is to the right and select Anti-Ice, ECS and Fuel buttons simultaneously. The MDC main menu should now be displayed on Display Unit #3.
    2. Using the joystick, select Current Faults (if the fault is active) or Aircraft History to research stored faults. From Aircraft History you can then select Fault History and locate the fault. Going into advanced diagnostics will provide an Equation ID for the fault identified.
    3. Select the MDC fault or Equation ID from the drop down below to get additional information to assist in troubleshooting.

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