background
x
loader
Troubleshooting
arrow By ATA By Message Color By Observed Faults By CAIMS By Tips

Select color for CAS message that you wish to troubleshoot

(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.

This page includes :

For AOG assistance contact:

CRC Montreal (YUL)
Quick Links

06/30/21

Message Overview:

Message Name:

AVIONICS COMPARTMENT LIGHTS UNSERVICEABLE

Message Code: 333OBS005
Effectivity: All
System: Service Compartment Lighting System
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:

One or more Avionics Compartment Lights do not come ON.

Possible Causes:

  • Avionics Compartment Light Bulb
  • Avionics Compartment Light Assembly
  • Light Switch
  • Right Auto Shutoff Box (A189)
  • 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:

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 Avionics Compartment Light AMM 33-31-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Avionics Compartment Light AMM 33-31-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Replacement of the Avionics Compartment Light-Bulb AMM 33-31-05-960-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Auto-Shutoff Box AMM 33-31-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Auto-Shutoff Box AMM 33-31-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Standard Practices - System Description SPM 20-00-00-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Swap the service light switch. 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 the next step.

  2. Measure the voltage between the connectors that follow and ground:

    Compartment Lights From To Result
    DS38 SP529 Ground
    DS37 SP530-B1 Ground
    DS36 TM46-H Ground
    DS35 SP531-B1 Ground
    DS34 SP532-B1 Ground
    DS33 SP533-B1 Ground

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

  3. Replace the unserviceable avionics compartment Light Assembly.

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

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

Registered and/or unregistered trademarks of Bombardier Inc. or its subsidiaries. © 2015 Bombardier Inc. All rights reserved.