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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:

R PACK LOW FLOW
(Status)

Reporting LRU: None
Pilot Action (QRH): None
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:

The PACK CONTROL rotary switch on the BLEED AIR control panel is set to the LO position.

Possible Causes:

  • PACK CONTROL rotary switch/BLEED AIR control panel
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Removal of the Rotary Switch/Potentiometer AMM 20-11-01-000-806 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Rotary Switch/Potentiometer AMM 20-11-01-400-806 [ 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 ]
Wire Repair SPM 20-12-10 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. On the BLEED AIR control panel, make sure that the PACK CONTROL rotary switch is not set to the HIGH position.
  2. On BLEED AIR control panel connector AP8J2 perform wiring checks between pin 52 and pin 3 (DC2 RTN).

    1. If continuity, go to step 4.
    2. If no continuity, continue with next step.

  3. On BLEED AIR control panel connector AP8J2 perform wiring checks between pin 52 and ground.

    1. If continuity, go to step 5.
    2. If no continuity, go to step 6.

  4. Replace PACK CONTROL rotary switch

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

  5. Replace BLEED AIR control panel.

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

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

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