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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

07/08/19

Message Overview:

Fault Message:

CPLT MASTER DISCONNECT SW/WRG FAULT

Fault Code:

27657240SX

Associated CAS:

STAB TRIM
(Caution)

SPLRS STAB BIT
(Advisory)

STAB CH1 FAIL
(Advisory)

STAB CH2 FAIL
(Advisory)

Reporting LRU: Flight-Control Unit (FCU)
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:

Copilot Master-Disconnect Switch is defective as monitored by the Flight-Control Unit (FCU). There are four sets of contacts in the Master Disconnect Switch. The Stabilizer/Pitch Trim System uses two sets. These two sets of contacts are usually closed.

Possible Causes:

  • Copilot Master Disconnect Switch (S44)
  • Flight-Control Unit (FCU) 1 (A65)
  • Flight-Control Unit (FCU) 2 (A66)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Master Disconnect Switches AMM 22-12-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Master Disconnect Switches AMM 22-12-17-400-801 [ 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 ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. If the fault message COPILOT MASTER DISC SWITCH FAULT was recorded from the FCU 1 and FCU 2, check copilot master disconnect switch continuity, wiring and functionality.
  2. If the fault message COPILOT MASTER DISC SWITCH FAULT was recorded from the FCU 1 only, perform wiring checks between FCU 1 (A65DP1) and copilot master disconnect switch.

    1. If wiring checks are good, swap FCU.

      1. If system checks are good, replace defective FCU. Reset FCUs latched faults and do close out.
      2. If fault remains, go to step 3.

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

  3. If the fault message COPILOT MASTER DISC SWITCH FAULT was recorded from the FCU 2 only, perform wiring checks between FCU 2 (A66DP1) and copilot master disconnect switch.

    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 defective FCU.
  5. Do close out.

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