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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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06/12/19

Message Overview:

Fault Message:

[ACSC2-B] CKPT TRIM AIR VLV CMD/TAV

Fault Code:

2164322ECS

Associated CAS:

TRIM AIR FAULT
(Advisory)

Reporting LRU: Air Conditioning System Controller (ACSC) 2
System Description: 21-60-00
Schematic Diagram: 21-60-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-60-03 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The Cockpit Trim Air Valve (TAV) (L26) position does not agree with the Air Conditioning System Controller 2 command.

Possible Causes:

  • Air Conditioning System Controller 2 (A88)
  • Bleed Air Control Panel (AP8)
  • Cockpit Trim Air Valve (TAV) (L26)
  • Junction Box (JB6)
  • Secondary-Power Distribution Assemblies (SPDA) 3 (A15)
  • Bleed Air Control Panel (TRIM AIR Switch) (SDS6)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active (Global Express / XRS - 9002 to 9312, 9314 to 9380, 9384 to 9429 and Global 5000 - 9127 to 9383, 9389 to 9400, 9404 to 9431 and 9998)

Forum Articles/Infoservice/Newsletter: None

Troubleshooting Tips:

Removal of the Trim Air Valves AMM 21-60-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Trim Air Valves AMM 21-60-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Air-Conditioning System Controllers AMM 21-60-21-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Air-Conditioning System Controllers AMM 21-60-21-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Junction Box JB6 AMM 24-00-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB6 AMM 24-00-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Secondary-Power Distribution Assemblies AMM 24-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Secondary-Power Distribution Assemblies AMM 24-62-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap Trim Air Valves.

    1. If the system check is good, replace defective Trim Air Valve and do close out.
    2. If the fault remains, continue with next step.

  2. Swap SPDA 3 with SPDA 2.

    1. If the system check is good, replace SPDA 3 and do close out.
    2. If the fault remains, continue with next step.

  3. Swap ACSC 2 with ACSC 1.

    1. If the system check is good, replace ACSC 2 and do close out.
    2. If the fault remains, continue with next step.

  4. Perform continuity check of JB6.

    1. If there is no continuity, replace JB6 and do close out.
    2. If there is continuity, continue with next step.

  5. Check K25 and K26 for correct operation.
  6. Perform a wiring check of wires between CKPT TAV and JB6.

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

  7. Perform a wiring check of wires between JB6 and ACSC 2.

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

  8. Perform a wiring check of wires between JB6 and Bleed Air Control Panel TRIM AIR SWITCH.

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

  9. Replace Bleed Air Control Panel.
  10. Check Trim Air Control Panel.
  11. Do close out.

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