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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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05/06/21

Message Overview:

GEAR SYS FAIL
(Caution)

DDG Reference: 32-30
Pilot Action (QRH): GEAR 10-4
System Description: 32-60-00
Schematic Diagram: 32-31-00
Wiring Diagram: 32-31-01
32-61-01
32-61-03
32-61-05
32-61-09

Message Description:

The amber 'GEAR SYS FAIL' caution CAS message indicates a complete failure of the gear control or the loss of the ARINC 429 bus from both channels.

  • Gear inputs not responding, a loss of the ARINC information from the PSEU has been detected.

Possible Causes:

  • Proximity Sensor Electronic Unit (PSEU) (A9)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

None

Troubleshooting Recommendations:

  1. Pull and reset the gear system breakers (CB1-C13, CB1-C14, CB2-C13, CB2-C14), recheck the system for the fault.
  2. 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.

45_current_faultsl_cbpnlr_cbpnl

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