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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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07/09/19

Message Overview:

Fault Message:

SLAT/FLAP CTRL UNIT #1/BUS FAULT

Fault Code:

27660191SX

Associated CAS:

RUD LIMITER FAIL
(Caution)

Reporting LRU: Flight-Control Unit (FCU) 1
System Description: 27-50-00
Schematic Diagram: 27-50-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 27-50-07 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Flight-Control Unit (FCU) 1 does not receive data from the Slat/Flap Control Unit (SFCU) 1.

Possible Causes:

  • Flight-Control Unit (FCU) 1 (A65)
  • Slat Flap Control Unit (SFCU) 1 (A124)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

Forum Articles/Infoservice/Newsletter: None

Reported in the FCU memory, when the SFCU is not powered, invalid or when there is no communication from the SFCU.

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

The status of the FCU can be found in CAIMS:

  1. SYSTEM DIAG
  2. 27-00 FLIGHT CONTROLS
  3. FLIGHT CONTROL UNIT #1
  4. LRU TEST
  5. DISPLAY MISC. & SENSORS STATUS
  6. Go to page 1 of 3

Quick Links:

Removal of the Slat/Flap Control Unit (SFCU) AMM 27-51-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Slat/Flap Control Unit (SFCU) AMM 27-51-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
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 ]
Access to System Diagnostics AMM 45-45-00-970-804 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. If CAS message(s) or CAIMS fault(s) related to the Slat Control System is posted in addition to RUD LIMITER FAIL and SLAT/FLAP CTRL UNIT #1/BUS FAULT, troubleshoot the additional message(s) first.
  2. Swap SFCU 1 with SFCU 2.

    1. If system checks are good, replace SFCU 1 and do close out.
    2. If fault remains, continue with next step.

  3. Perform wiring checks between FCU 1 and SFCU 1 as follow:

    From To Result
    A124AP1-65 A65DP1-7K
    A124AP1-78 A65DP1-7J

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  4. Replace FCU 1 and reset FCUs latched faults.
  5. Do close out.

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