04/16/25
Message Overview:
Message Name:
SOLENOID VALVE/WIRING
Message Code:
3250008DWY
Associated CAS:
| Reporting LRU: | Steering Control Unit (SCU) |
| System Description: | 32-51-00 - Nosewheel-steering Control System |
| Schematic Diagram: | 32-51-00 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wiring Diagram: | 32-51-01 [ Global Express ] [ G5000 ] [ Global XRS ] |
Message Description:
The Steering Control Unit detected a problem with the Steering Solenoid Valve or its interface to the SCU.
Possible Causes:
- Steering Solenoid Valve (SSV) (L1)
- Steering Pressure Switch (S2)
- Steering Control Unit (SCU) (A36)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin:
- AW700-32-0280 - Nose Wheel Steering - Troubleshooting of SCU GW415-8100-3
Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None
Flight Operation Notifications Manual (FONM): None
NOTES:
- Normal behavior of Steering Pressure Switch S2:
- Open circuit between pins A and B when steering select valve is not armed - no pressure
- Closed circuit between pins A and B when steering select valve is armed - hydraulic system #3 is energized
Quick links:
| Rigging of the Nosewheel-Steering Control System (Recommended Procedure) |
AMM 32-51-00-820-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Rigging Check of the Nosewheel-Steering Control System | AMM 32-51-00-220-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Steering Control Unit | AMM 32-51-01-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Steering Control Unit | AMM 32-51-01-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Steering Solenoid Valve | AMM 32-51-13-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Steering Solenoid Valve | AMM 32-51-13-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Removal of the Steering Pressure Switch | AMM 32-51-29-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Steering Pressure Switch | AMM 32-51-29-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Re-seat SCU.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Perform a wiring check between SCU and Steering Solenoid Select Valve (L1).
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Perform a wiring check between SCU and Steering Pressure Switch (S2).
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Replace Steering Pressure Switch (S2).
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace Steering Solenoid Select Valve.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace SCU.
- Do close out.