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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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06/30/21

Message Overview:

Message Name:

NOSE WHEEL COMPARTMENT LIGHT UNSERVICEABLE

Message Code: 331OBS010
Effectivity: All
System: Service Compartment Lighting
System Description: 33-31-00
Schematic Diagram: 33-31-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 33-31-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

The Nosewheel Compartment Light does not come on.

Possible Causes:

  • Nosewheel Compartment Light (DS32)
  • Nosewheel Compartment Bulb
  • Light Switch
  • Forward Auto-Shutoff Box (A186)

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Forward Maintenance
Lights		 AMM 33-31-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Nosewheel Compartment Light AMM 33-31-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Nosewheel Compartment Light AMM 33-31-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Replacement of the Nosewheel Compartment
Light-Bulb		 AMM 33-31-01-960-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Safety Precautions - Maintenance Practices - ALL SPM 20-00-01-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Set a different service light switch to on. Check if the compartment lights come on.
    NOTE: This makes sure the switch is not the cause of the problem.

    1. If YES, replace the defective light switch and do close out.
    2. If NO, continue with next step.

  2. Measure the voltage at the connections of DS32 as follows:

    From To Expected Result Result
    SP731-1 Ground +28 VDC

    1. If there is voltage, replace the bulb of the unserviceable nosewheel compartment light and do close out.
    2. If there is voltage and the light bulb was already replaced, replace the nosewheel light assembly and do close out.
    3. If there is no voltage, repair or replace the defective associated wiring and continue with next step.

  3. Is the fault still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  4. Replace the forward auto shutoff box.
  5. Do close out.

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