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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

06/30/21

Message Overview:

Message Name:

DOME LIGHT UNSERVICEABLE

Message Code: 331OBS003
Effectivity: All
System: Miscellaneous Lighting
System Description: 33-13-00
Schematic Diagram: 33-13-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 33-13-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

Dome (Area) Light or Lights do not come on.

Possible Causes:

  • Dome Light Bulb
  • Left Dome Light (DS44)
  • Right Dome Light (DS45)
  • Area Lights Switch (S4)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: Each avionics compartment light assembly has six bulbs, thus you can be sure if the bulb is serviceable or not. If a bulb is unserviceable, replace it.

Quick Links:

Connect Electrical Power to the Aircraft AMM 24-00-00-861-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Remove the Electrical Power from the Aircraft AMM 24-00-00-861-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the DC Power Center (DCPC) AMM 24-61-00-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the DC Power Center (DCPC) AMM 24-61-00-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Functional Test of the DC Power Center (DCPC)
Circuit-Breakers		 AMM 24-61-45-720-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Bulkhead Panels AMM 25-12-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Bulkhead Panels AMM 25-12-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the COCKPIT LIGHTS (INTEGRAL)
Control Panel		 AMM 33-11-09-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the COCKPIT LIGHTS (INTEGRAL)
Control Panel		 AMM 33-11-09-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the COCKPIT LIGHTS (INTEGRAL)
Control Panel		 AMM 33-11-09-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Area Lights AMM 33-13-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Area Lights AMM 33-13-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Replacement of the Area Light Bulb AMM 33-13-01-960-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Area Lights AMM 33-13-01-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Safety Precautions - Maintenance Practices - ALL SPM 20-00-01-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Disconnect the connectors (DS44P1 and DS44P2) for the pilot’s dome light (DS44) and/or the connectors (DS45P1 and DS45P2) for the copilot’s dome light (DS45) for the light that does not come on. Set the AREA light switch to BRT and measure the voltage at the connectors that follows:

    From To Expected Result Result
    DS44P1-1 DS44P2-1 28 VDC
    DS45P1-1 DS45P2-1(Ground) 28 VDC

    1. If there is no +28 VDC, go to step 4.
    2. If there is +28 VDC, replace the Dome Light Bulb and continue with next step.

  2. Check if the dome lights operate correctly.

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

  3. Disconnect the Cockpit Lights (INTEGRAL) Control Panel connector (AP26P1) and the DC Power Center (DCPC) connector (A63P3). Perform voltage check as follows:

    From To Expected Result Result
    AP26P1-22 Ground 28 VDC

    1. If there is no 28 VDC, go to step 6.
    2. If there is 28 VDC, continue with next step.

  4. Perform a continuity check as follows:

    From To Result
    AP26P1-22 A63P3-F

    1. If there is no continuity, repair or replace defective wiring as required and go to step 7.
    2. If there is continuity, continue with next step.

  5. Disconnect the pilot’s dome light (DS44) connectors (DS44P1 and DS44P2), the copilot’s dome light (DS45) connectors (DS45P1 and DS45P2) and the Cockpit Lights (INTEGRAL) Control Panel connectors (AP26P1 or AP26P2). Perform a continuity check as follows:

    From To Result
    DS44P1-1 AP26P1-19
    DS44P2-2 AP26P1-18
    GS686 AP26P1-17
    DS45P1-1 AP26P2-19
    GS566 DS45P2-1

    1. If there is no continuity, repair or replace defective wiring as required and do close out.
    2. If there is continuity, continue with next step.

  6. Connect the disconnected connectors.
  7. Perform the operational test of the Dome Lights.

    1. If the operational test is satisfactory, do close out.
    2. If the operational test is not satisfactory, continue with next step.

  8. Perform the troubleshooting of observed fault COCKPIT LIGHTS (INTEGRAL) CONTROL PANEL MALFUNCTION.
  9. Do close out.

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