06/30/21
Message Overview:
Message Name:
LOGO LIGHTING TRANSFORMER UNSERVICEABLE
| Message Code: | 334OBS008 |
| Effectivity: | Post SB 700-33-001 and 9002 to 9122 Pre SB 700-24-045 |
| System: | Logo Lighting System |
| System Description: | 33-46-00 |
| Schematic Diagram: | 33-46-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 33-46-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
There is no 28 VAC output from the Logo Lighting Transformer.
Possible Causes:
- External Lights Control Panel (AP11)
- Logo Lighting Transformer
- Auxiliary Power Unit (APU) Starter Contactor Assembly (ASCA) (A48)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- SB 700-33-001 - Logo Lighting - Addition of Logo Lights
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 APU Starter-Contactor Assembly | AMM 24-62-05-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the APU Starter-Contactor Assembly | AMM 24-62-05-400-801 [ 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 ] |
| Operational Test of the Logo Lighting | AMM 33-46-00-710-801 [ 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:
- Set the LOGO switch to ON.
- Perform a voltage check at the input of the ASCA at the connectors within APU starter-contactor assembly connector (A48P1) as follows:
From To Expected Result Result A48P1-K A48P1-L 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 the APU starter-contactor assembly.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Perform a wiring check of the external lights control panel.
- If the wiring checks are not good, repair defective wiring as required and do close out.
- If the wiring checks are good, 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 the troubleshooting for CAS Message listed below:
- Do close out.