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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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Quick Links

07/04/19

Message Overview:

Fault Message:

LH MFS #4 ACTUATOR/WRG FAULT

Fault Code:

27656241SX

Associated CAS:

CONFIG SPOILERS
(Warning)

FLT SPOILERS FAIL
(Caution)

GND LIFT DUMP
(Caution)

FLT SPOILERS FAULT
(Advisory)

GND LIFT DUMP
(Advisory)

NO TAKEOFF
(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: 27-60-09 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

There is a problem with the Left Multi Function Spoiler (MFS) 4 Actuator and detected by the Flight Control Unit 1 channel A. The Left MFS 4 failed to deploy.

Possible Causes:

  • Left Multi Function Spoiler (MFS) Power Control Unit (PCU) 4 (B46)
  • 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. If the fault clears, swap FCU positions.

Getting access to the left MFS actuator #4 connector, to check for/remove any corrosion may clear the condition on the a/c.

The left MFS#4 data can be found in CAIMS:

  1. SYSTEM DIAG.
  2. 27-00 FLIGHT CONTROLS.
  3. FLIGHT CONTROL UNIT #1.
  4. LRU TEST.
  5. DISPLAY SPOILER DATA.
  6. CONFIRM.
  7. Go to sheets 1/3.

And

  1. SYSTEM DIAG.
  2. 27-00 FLIGHT CONTROLS.
  3. FLIGHT CONTROL UNIT #1.
  4. LRU TEST.
  5. DISPLAY ADVANCED EFCS DATA.
  6. Go to page 2 of 8 and make sure the channel B is active.

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 Multi-Function Spoiler Power-Control-Units (PCU) AMM 27-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Multi-Function Spoiler Power-Control-Units (PCU) AMM 27-62-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect the left MFS 4 connector (B46) to check for corrosion on the pins and sockets.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.
      NOTE: Use contact cleaner.

  2. Swap FCU 1 with FCU 2.

    1. If system checks are good, replace FCU 1. Reset FCUs latched faults and do close out.
    2. If fault remains, continue with next step.
      NOTE: If the fault follows the FCU, it will posted on the left MFS 2.

  3. Perform wiring checks between FCU 1 and MFS 4.

    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 Left MFS 4 PCU.
  5. Do close out.

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