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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:

L PACK OFF
(Status)

DDG Reference: 21-62-02
Pilot Action (QRH): ENVR 06-22
System Description: 21-52-00
Schematic Diagram: 21-52-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 21-52-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

L PACK Switch/Light on the BLEED AIR Control Panel set to ON.

Possible Causes:

  • L PACK Switch/Light/BLEED AIR Control Panel
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Switch/Lights AMM 20-11-02-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Switch/Lights AMM 20-11-02-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Bleed Air Control Panel AMM 36-11-57-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Bleed Air Control Panel AMM 36-11-57-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram 36-11 WM 36-11 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. On the BLEED AIR control panel, make sure that the left pack switch/light is not set to OFF.
  2. Swap PBAs.

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

  3. On the BLEED AIR control panel, perform wiring checks between the pins of the connectors and aircraft ground that follow:

    AP8J1 AIRCRAFT GROUND
    pin 13 Ground
    pin 39 Ground
    pin 2 Ground
    pin 38 Ground

    1. If there is continuity to ground, continue.
    2. If there is no continuity to ground, go to step 5.

  4. Replace BLEED AIR control panel.

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

  5. Repair or replace the interface wiring.
  6. Do close out.

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