L FADEC FAIL
(Caution)

The engine control system shows the amber 'L FADEC FAIL' caution CAS message when it determines that any part of the FADEC (both ECUs, all sensors and effectors) has failed.

• Left Engine FADEC common ECU fault
• Left Engine FADEC common P0 fault
• Left Engine CGV actuator
• Left Engine fuel system HMU
• Left Engine N1 monopole
• Left Engine surge bleed valve B
• Left Engine surge bleed valve C
• Left Engine TT2 sensor/heater
• Left Engine Anti-ice Valve
• W5 Harness
• OSSD Sensor

Advisory Wire/Service Bulletin:

• AW300-76-0243 - Electronic Control Unit (ECU) Water Ingress (20501 - 20999)

Forum Articles/Infoservice/Newsletter: None

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 Message 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 from the drop down below to provide additional information to assist in troubleshooting.
      Select an MDC Fault Code/Message:B3-304646 - TT2 SENSOR/HEATER 4 [L ENG TT2 SNSR]B3-303773 - SURGE BLEED VALVE B 4 [L ENG SBV B]B3-303785 - SURGE BLEED VALVE C 4 [L ENG SBV C]B3-302580 - CGV ACTUATOR 4 [L ENG CGV ACT]B3-303014 - FUEL SYSTEM HMU 4 [L ENG HMU]B3-302940 - FADEC COMMON ECU 4 [L ENG BOTH ECU]B3-302942 - FADEC COMMON P0 [L ENG BOTH ECU]B3-303583 - N1 MONOPOLE 4 [L ENG N1 MONO]