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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:

WING LANDING/TAXI LIGHTS UNSERVICEABLE

Message Code: 334OBS015
Effectivity: All
System: Landing And Taxi Lighting System
System Description: 33-41-00
Schematic Diagram: 33-41-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 33-41-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

Wing landing/taxi (taxi/recognition) Light or Lights do not come ON.

Possible Causes:

  • Left Wing Landing/Taxi Light (DS31)
  • Right Wing Landing/Taxi Light (DS30)
  • Wing Landing/Taxi Light Bulb
  • Left Wing Landing Light Switch (S6)
  • Left Wing Landing Light Switch (S8)
  • Taxi/Recog Light Switch (S9)
  • ACPC Logic Assembly (A54)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

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 Secondary-Power Distribution Assemblies AMM 24-62-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Secondary-Power Distribution Assemblies AMM 24-62-01-400-801 [ 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 ]
Removal of the Wing Landing/Taxi Lights AMM 33-41-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Wing Landing/Taxi Lights AMM 33-41-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Replacement of the Wing Landing/Taxi Light-Bulb AMM 33-41-01-960-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Wing Landing/Taxi Lights AMM 33-41-01-710-801 [ 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. Perform the operational test of the wing landing and taxi lights.
    NOTE: If both landing/taxi lights on one wing are not lit, the wing LANDING light switch is most likely defective.

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

  2. Set the other applicable wing taxi light switch to on. Check if the problem is corrected.
    NOTE: This makes sure the light switch is not the cause of the wing taxi light problem.

    1. If YES, replace the EXTERNAL LIGHTS control panel and do close out.
    2. If NO, continue with next step.

  3. Measure the voltage at the applicable connectors as follows:

    From To Expected Result Result
    DS31P1-A DS31P1-B 115 VAC
    DS31P1-C DS31P1-D 115 VAC
    DS30P1-A DS30P1-B 115 VAC
    DS30P1-C DS30P1D 115 VAC

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

  4. Replace the applicable bulb of the wing landing/taxi light bulb.

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

  5. Replace the wing landing/taxi light.

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

  6. Access ACPC Logic assembly.

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

  7. Swap SSPC 3 (left wing ldg/taxi lights) with SSPC 12 (Right wing ldg/taxi lights). Did the fault transfer over to the other side?

    1. If YES, replace defective SSPC card and do close out.
    2. If NO, continue with next step.

  8. Perform wiring checks between respective landing/taxi light and ACPC. Repair as required.
  9. Do close out.

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