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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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For AOG assistance contact:

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Quick Links

05/12/23

Message Overview:

Fault Message:

FCU #1/ BUS FAULT [FCU1/FCM B]

Fault Code:

27660252SX

Associated CAS:

SPLRS STAB BIT
(Advisory)

Reporting LRU: Flight-Control Unit (FCU) 1
System Description: 27-60-00
Schematic Diagram: 27-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 27-60-06 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

There is a problem with the Flight-Control Unit (FCU) 1 channel B communication bus to the FCU 2 channel B

Possible Causes:

  • Flight-Control Unit (FCU) 1 (A65)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

This fault may sometime be cleared by performing the flight control system reset procedure.

Quick Links:

Removal of the Flight-Control Units AMM 27-61-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Flight-Control Units AMM 27-61-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Perform wiring checks between FCU 1 and FCU 2 as follow:

    From To Result
    A65DP1-10J A66DP1-1D
    A65DP1-10K A66DP1-1E

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  2. Replace FCU 1 and reset FCUs latched faults.
  3. Do close out.

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