06/30/21
Message Overview:
Message Name:
FAILURE INDICATOR BOX-AUTOMATIC SECONDARY LIGHT SELECTION IS UNSERVICEABLE
| Message Code: | 334OBS003 |
| Effectivity: | All |
| System: | Navigation Lighting System |
| System Description: | 33-42-00 |
| Schematic Diagram: | 33-42-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 33-42-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
Automatic Secondary Light selection does not operate. There is no 28 VDC output from the Failure Indicator Box. There is no failure output to Data Acquisition Unit (DAU) 4.
Possible Causes:
- Failure Indicator Box (A126)
- External Lights Control Panel (AP11)
- 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 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 Navigation Lighting | AMM 33-42-00-710-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Failure Indicator Box | AMM 33-42-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Failure Indicator Box | AMM 33-42-13-400-801 [ 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:
- Set the NAV switch to ON.
- Measure the voltage at the connector A126P1 as follows:
From To Result A126P1-A A126P1-P - If there is no voltage, repair the defective wiring as required and do close out.
- If there is voltage, continue with next step.
- Replace the failure indicator box. Is the fault still present?
- If NO, do close out.
- If YES, continue with next step.
- Replace the external lights control panel. Is the fault still present?
- If NO, do close out.
- If YES, continue with next step.
- Perform troubleshooting procedure for CAS message below. Is the fault still present?
- If NO, do close out.
- If YES, continue with next step.
- Perform wiring check between DAU 4 and Failure Indicator Box. Repair as required.
- Do close out.