06/30/21
Message Overview:
Message Name:
AFT EQUIPMENT COMPARTMENT LIGHTS UNSERVICEABLE
| Message Code: | 333OBS002 |
| Effectivity: | All |
| System: | Service Compartment Lighting System |
| System Description: | 33-31-00 |
| Schematic Diagram: | 33-31-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 33-31-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
One or more Aft Equipment Compartment Lights do not come ON.
Possible Causes:
- Aft Equipment Compartment Light (DS55)
- Aft Equipment Compartment Light (DS56)
- Aft Equipment Compartment Light (DS57)
- Aft Equipment Compartment Light Bulb
- Aft Equipment Compartment Light Assembly
- Aft Auto-Shutoff Box (A189)
- Light Switch
- Associated Wiring
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 Aft Maintenance Lights | AMM 33-31-00-710-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Aft Equipment-Compartment Light | AMM 33-31-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Aft Equipment-Compartment Light | AMM 33-31-13-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Replacement of the Aft Equipment-Compartment Light-Bulb | AMM 33-31-13-960-801 [ 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:
- Swap the service light switch. Check if the problem is corrected.
NOTE: This makes sure the switch is not the cause of the problem.- If YES, replace the defective light switch and do close out.
- If NO, continue with next step.
- Perform the voltage check for connector of aft equipment compartment lights as follows:
From To Expected Result Result DS55-1 DS55-2 28 VDC DS56-1 DS56-2 28 VDC DS57-1 DS57-2 28 VDC - If there is no voltage, repair or replace the defective wiring as required and do close out.
- If there is voltage, continue with next step.
- Replace Light Bulb of the unserviceable AFT Equipment Compartment Light.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace AFT Equipment Compartment Light Assembly.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace AFT Auto Shutoff Box.
- Do close out.