L ENG THRUST FAULT
(Advisory)

Whenever the engine control system detects an alteration to the provided thrust as compared to the expected one provided this alteration does not cause a loss of thrust control.

• Thrust control is performed by the engine ECUs, Check MDC fault and for MCID code in advanced troubleshooting.

• ARINC data reception loss or invalidity in input of FADEC (at least one label)
• Bleed System
• N1 Compensator Function
• Engine Anti-ice Pressure Sensor
• Wing Cross-Bleed Valve (MPE10)

Advisory Wire/Service Bulletin:

• AW300-36-0008 -"WING ANTI-ICE LEAK" EICAS Message During Climb

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

• If ENG THRUST FAULT comes along with faults related to airspeed, altitude, stab, trim, spoiler, or following a change of Air Data Source selection on the Reversion Select Panel, the ADC is most likely the root cause.
• If both L & R ENG THRUST FAULT are posted at the same time, first suspect the Wing Anti-Ice (WAI) PBA or the Stall Protection Computer (SPC), which are common to both engines. Refer to the following codes for detailed troubleshooting:
  Select an MDC Fault Code/Message:B3-302118 - AIRCRAFT BLEED SYSTEM [AC BLEED SYS]B3-302120 - AIRCRAFT BLEED SYSTEM [AC BLEED SYS]
  Experience has shown that not turning the WAI OFF after a WING ANTI-ICE LEAK' CAS message could lead to an 'ENG THRUST FAULT' CAS message. Refer to the AW listed above for more details.
• When Batteries are 'ON' and engines are not running, if WAI is 'ON' while the rotary switch is on 'NORM', the L (R) ENG THRUST FAULT CAS message will display.

1. Are any of the following CAS messages associated to Anti-ice or Bleed also displayed?
   Select a CAS Message:L ENG ANTI-ICE FAILL WING ANTI-ICE FAILR ENG ANTI-ICE FAILR WING ANTI-ICE FAILWING ANTI-ICE FAULTL ENG A/ICE FAIL ONR ENG A/ICE FAIL ONWING ANTI-ICE FAULTBLEED LOOP FAULTL PYLON LOOP FAILR PYLON LOOP FAILWING A/ICE LOOP FAIL
   

   1. If YES, start troubleshooting with those CAS message as L/R ENG THRUST FAULT is likely a consequence of the other CAS message root cause.
   2. If NO, continue with next step.

2. Go into the MDC and select the appropriate MDC fault.

   1. Interrogate the MDC as follows:
   2. 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.
   3. 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.
   4. 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:B3-302137 - A/I PRESSURE SENSOR 4 [L ENG AI PRES]B3-302172 - ANTI-ICE OVER PRESSURE [L ENG AI SYSTEM]B3-303761 - SURGE BLEED VALVE A 4 [L ENG SBV A]B3-302115 - AIRCRAFT ARINC SYSTEM [AC ARINC SYS]B3-302118 - AIRCRAFT BLEED SYSTEM [AC BLEED SYS]B3-303571 - N1 COMPENSATOR 4 [L ENG N1 COMP]B3-303573 - N1 COMPENSATOR 5 [L ENG N1 COMP]B3-302180 - ARINC RECEIVER ARI-1A [L ENG ARINC]B3-302182 - ARINC RECEIVER ARI-1B [L ENG ARINC]B3-371868 - ARINC RECEIVER ARI-3A [L ENG ARINC]B3-371870 - ARINC RECEIVER ARI-3B [L ENG ARINC]