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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:

LOGO LIGHTS UNSERVICEABLE

Message Code: 334OBS009
Effectivity: Post SB 700-33-001
System: Logo Lighting System
System Description: 33-46-00
Schematic Diagram: 33-46-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 33-46-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

Logo Light or Lights do not come ON.

Possible Causes:

  • External Lights Control Panel (AP11)
  • Logo Light Bulb
  • Left Logo Light (DS62)
  • Right Logo Light (DS63)
  • Logo Light Switch
  • Logo Light Assembly
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • SB 700-33-001 - Logo Lighting - Addition of Logo Lights
  • SB 700-24-045 - Modification - AC and DC Power Distribution - Unit Change and Activation of Build 4 Electrical System

Forum Articles/Infoservice/Newsletter: None

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 ]
Opening of Non-Thermal Circuit Breakers AMM 24-00-00-863-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Closing of Non-Thermal Circuit Breakers AMM 24-00-00-863-802 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Electrical/Electronic Safety Precautions AMM 24-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the EXTERNAL LIGHTS Control Panel AMM 33-40-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the EXTERNAL LIGHTS Control Panel AMM 33-40-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Logo Lighting AMM 33-46-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Logo Lights AMM 33-46-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Logo Lights AMM 33-46-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Replacement of the Logo Light Bulb AMM 33-46-01-960-801 [ 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:

On A/C 9002 to 9122 Pre SB 700-24-045:

  1. Set the LOGO switch to ON.

    1. If both logo lights do not operate, perform the troubleshooting for LOGO LIGHTING TRANSFORMER UNSERVICEABLE and continue with next step.
    2. If only one logo light does not operate, continue with next step.

  2. Disconnect the connectors (DS62P1) for the left logo light (DS62) and (DS63P1) for the right logo light (DS63). Perform a voltage check at the connectors as follows:
    For the left logo light (DS62):

    From To Expected Result Result
    DS62P1-A DS62P1-B 28 VDC

    For the right logo light (DS63):

    From To Expected Result Result
    DS63P1-A DS63P1-B 28 VDC

    1. If there is voltage, go to step 5.
    2. If there is no voltage, continue with next step.

  3. Replace logo light bulb.

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

  4. Replace logo light assembly.

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

  5. Disconnect the connector A48J1 and measure the voltage at the connector A48J1 that follow:
    For the Left Logo Light, Between APU Starter-Contactor Connector (A48J1):

    From To Expected Result Result
    A48J1-M A48J1-P 28 VAC

    For the Right Logo Light, Between APU Starter-Contactor Connector (A48J1):

    From To Expected Result Result
    A48J1-N A48J1-R 28 VAC

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

  6. perform the troubleshooting for LOGO LIGHTING TRANSFORMER UNSERVICEABLE and continue with next step.

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

  7. Perform the troubleshooting for CAS Message listed below:
  8. Do close out.

On A/C 9123 and subs and Post SB 700-24-045:

  1. Set the LOGO switch to ON.

    1. If both logo lights do not operate, replace the external lights control panel and do close out.
    2. If only one logo light does not operate, continue with next step.

  2. Disconnect the connectors (DS62P1) for the left logo light (DS62) and (DS63P1) for the right logo light (DS63). Perform a voltage check at the connectors that follow:
    For the left logo light (DS62):

    From To Expected Result Result
    DS62P1-A DS62P1-B 28 VDC

    For the right logo light (DS63):

    From To Expected Result Result
    DS63P1-A DS63P1-B 28 VDC

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

  3. Replace logo light bulb.

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

  4. Replace logo light assembly.

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

  5. Perform the troubleshooting for CAS Message listed below:
  6. Do close out.

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