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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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02/16/21

Message Overview:

Message Name:

[ACSC1-A] LH FLOW CONT VLV CMD/FCV

Message Code:

2161321ECS

Associated CAS:

L PACK FAIL
(Caution)

L PACK FAULT
(Advisory)

Reporting LRU: Air Conditioning System Controller (ACSC) 1
System Description: 21-51-00
21-52-00
Schematic Diagram: 21-52-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-52-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The Left Flow Control Valve has been detected failed either in opened or closed position.

Possible Causes:

  • Left Flow Control Valve (FCV) (L24)
  • Compressor Pneumatic Overheat-Sensor (CPNOH)
  • Junction Box (JB5)
  • Left Air Conditioning System Controller (ACSC) (A87)
  • Secondary Power Distribution Assembly (SPDA) 2 (A14)
  • Data Acquisition Unit (DAU) 1 (A17)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-21-0160 - "PACK FAULT" CAS message while CAIMS / OMS is active

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Flow Control Valves AMM 21-51-25-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Flow Control Valves AMM 21-51-25-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Compressor Pneumatic Overheat-Sensors AMM 21-52-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Compressor Pneumatic Overheat-Sensors AMM 21-52-17-400-801 [ 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 JB5 AMM 24-00-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Junction Box JB5 AMM 24-00-09-400-801 [ 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 ]
Removal of the Data Acquisition Units (DAU) AMM 31-42-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Data Acquisition Units (DAU) AMM 31-42-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Gently tap on the left FCV. Did the valve move to the commanded position after tapping?

    1. If YES, replace the FCV.
    2. If NO, continue with next step.
      NOTE: You may also verify that the FCV servo air line is properly secured into place. See image below.

  2. Interchange Left FCV with Right FCV.

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

  3. For Intermittent Faults, Download ACSC NVMs send to CRC for analysis to see what is failure mode. Failed Open or Failed closed, on ground or in flight.
  4. Perform leak check of the sense line between FCV1 and CPNOH.
  5. Interchange CPNOH.

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

  6. Interchange ACSC 1 with ACSC 2.

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

  7. Interchange DAU 1 with DAU 2.

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

  8. Interchange SPDA 2 with SPDA 3.

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

  9. Perform wiring checks of all wiring / circuits related to the FCV.

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

  10. Remove JB5 and check K22 operation .
  11. Perform a continuity check of JB5.

    1. If there is continuity, repair the defective associated wiring and do close out.
    2. If there is no continuity, continue with next step.

  12. Replace JB5.
  13. Do close out.

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