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(WARNING)
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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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06/22/21

Message Overview:

AIRFLOW INTO PASSENGER COMPARTMENT HIGHER THAN VALUE SET WITH L PACK CONTROL ROTARY SWITCH

Identifier: 215OBS004
Effectivity: All
System: Air Conditioning
Associated CAS: None
System Description(:|) 21-51-00
Schematic Diagram: 21-51-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-51-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The total airflow which goes into the passenger compartment is apparently lower than the set value on the PACK CONTROL rotary switch on the BLEED AIR control panel.

Possible Causes:

  • Pack Inlet Pressure Sensor has high drift
  • Pack Inlet Flow Sensor has low drift
  • Leakage at the Pneumatic Lines Locations between the Flow Sensor Venturi, the Pack Inlet Pressure Sensor, and the Pack Inlet Flow Sensor

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Notice To Operators (NTO): None

Flight Operation Notifications Manual (FONM): None

Quick Links:

Flow Sensor Venturis - Removal AMM 21-51-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Flow Sensor Venturis - Installation AMM 21-51-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Pack Inlet Pressure Sensor - Removal AMM 21-51-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Pack Inlet Pressure Sensor - Installation AMM 21-51-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Access System Diagnostics AMM 45-45-00-970-804 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Do a leak test at the pneumatic line location between the left flow sensor venturi and the left pack inlet pressure sensor; between the left flow sensor venturi and the left pack inlet flow sensor as follows:

    1. Examine the pneumatic line and pneumatic line connections.
    2. Use the leak detector to find leaks and make a mark on the location where leaks are found.
    3. If there is a leak in the pneumatic line, repair the leak.

  2. Swap flow sensor venturis.

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

  3. Swap Pack Inlet Pressure Sensors.

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

  4. Swap Pack Inlet Flow Sensors.
  5. Do close out.

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