06/30/21
Message Overview:
Message Name:
FLIGHT-CREW READING LIGHT UNSERVICEABLE
| Message Code: | 331OBS005 |
| 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:
Flight-Crew Reading (Map) Light or Lights do not come on.
Possible Causes:
- Flight-Crew Reading Light Bulb
- Pilot Reading Light (DS53)
- Copilot Reading Light (DS54)
- Secondary Power Distribution Assembly (SPDA) 2 (A14)
- 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 ] |
| Operational Test of the Secondary-Power Distribution Assembly 2 |
AMM 24-62-01-710-802 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Operational Test of the Flight Compartment Floodlights |
AMM 33-13-00-710-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Map Reading Lights | AMM 33-13-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Map Reading Lights | AMM 33-13-05-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Replacement of the Map Reading Light-Bulb | AMM 33-13-05-960-801 [ 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:
- Disconnect the affected map light DS53 (MAP LT STN 250 LHS) or DS54 (MAP LT STN 250 RHS). Perform voltage check as follows:
From To Expected Result Result DS53P1-1 DS53P2-1 +28 VDC DS54P1-1 DS54P2-1 +28 VDC - If there is no voltage, go to step 4.
- If there is voltage, continue with next step.
- Replace the bulb of the flight-crew reading light and perform the operational test.
- If the flight-crew reading light operates, do close out.
- If the flight-crew reading light does not operate, continue with next step.
- Replace the flight-crew reading light and perform the operational test.
- If the flight-crew reading light operates, do close out.
- If the flight-crew reading light does not operate, continue with next step.
- Disconnect the connector SPDA 2 STN 450 LHS (A14P1). Perform a continuity check between the pins of the connectors DS53 (MAP LT STN 250 LHS) or DS54 (MAP LT STN 250 RHS) and SPDA 2 STN 450 LHS (A14P1) as follows:
For the pilot’s map light:From To Result DS53P1-1 A14P1-F DS53P2-1 GS568 For the copilot's map light:
From To Result DS54P1-1 A14P1-F DS54P2-1 GS567 - If there is no continuity, repair or replace the defective wiring as required. Connect the applicable map light (DS53 or DS54) and the disconnected SPDA 2 connector (A14P1).
- If there is continuity, continue with next step.
- Perform the troubleshooting of SPDA 2.
- Do close out.