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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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07/03/19

Message Overview:

Fault Message:

FCU #1 POST NOT RUN [LGECU INVLD]

Fault Code:

27653261SX

Associated CAS:

None

Reporting LRU: Landing Gear Electronic Control Unit (LG ECU)
Flight Control Unit (FCU) 1
System Description: 27-60-00
Schematic Diagram: 27-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 27-60-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

Landing Gear Electronic Control Unit (LG ECU) and the Flight Control Unit (FCU) could not perform the System Power-On Self Test (SPOST).

Possible Causes:

  • Landing Gear Electronic Control Unit (LG ECU) (A52)
  • Flight Control Unit (FCU) 1 (A65)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

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 ]
Removal of the Landing-Gear Electronic Control-Unit (LG ECU) AMM 32-31-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Landing-Gear Electronic Control-Unit (LG ECU) AMM 32-31-09-400-801 [ 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. Re-rack FCUs.

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

  2. Swap FCU 1 with FCU 2.

    1. If system checks are good, replace FCU 1 and reset FCUs latched faults and do close out.
    2. If fault remains, continue with next step.

  3. Perform wiring checks between FCU 1 (A65AP1) and LGECU (A52BP1).

    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.

  4. Replace LGECU.
  5. Do close out.

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