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(WARNING)
RED MESSAGE (CAUTION)
AMBER MESSAGE (ADVISORY)
CYAN MESSAGE (STATUS)
WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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04/16/25

Message Overview:

Message Name:

STEER SOLENOID VALVE PRESS SW #1/WRG

Fault valid when SCU GW415-8100-3 is installed on the aircraft.

Message Code:

3250019DWY

Associated CAS:

NOSE STEER FAIL
(Caution)

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: 32-51-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Message Description:

Associated Steering Control Unit (SCU) window fault code: -6

The Steering Control Unit detected that there is pressure at the Nose Wheel Steering (NWS) Pressure Switch 1 when the Steering Switch is not armed and the Hydraulic System 3 is not pressurized or there is no pressure at the NWS Pressure Switch 1 when the Steering Switch is armed and the Hydraulic System 3 is pressurized.

Possible Causes:

  • Steering Pressure Switch 1 (S2)
  • Steering Solenoid Valve (SSV) (L1)
  • Landing Gear Selector Valve 3 (L17)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

  • AW700-32-0280 - Nose Wheel Steering - Troubleshooting SCU GW415-8100-3

Full Throttle Blog/Forum Articles/Infoservice/Newsletter: None

Flight Operation Notifications Manual (FONM): None

NOTES:

  • The Fault annunciation window in front of the Steering Control Unit (SCU) may be used to identify which part of the system failed.

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 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:

NOTE: This fault could be caused by a faulty Landing Gear Selector Valve 3. You can troubleshoot it using the GEAR DISAGREE procedure and not selecting any CAIMS message.

  1. Check CAIMS for the SOLENOID VALVE/WIRING (3250008DWY) message.

    1. If the message is shown, perform troubleshooting of SOLENOID VALVE/WIRING (3250008DWY).
    2. If the message is not shown, continue with next step.

  2. With no hydraulic pressure on the aircraft and the NLG doors open, manually close the NLG up-lock by hand.
  3. Select Hydraulic system 3 pumps 3A or 3B ON and check if the NLG Up-Lock opened.

    1. If the NLG Up-Lock did not open, troubleshoot the Landing Gear Selector Valve 3 using the GEAR DISAGREE procedure and not selecting any CAIMS message.
    2. If the NLG Up-Lock opened, continue with next step.

  4. Set the Hydraulic system switch 3A and 3B to ON.

    1. If the NOSE STEER FAIL (amber) message is not shown on EICAS, go to step 6.
    2. If the NOSE STEER FAIL (amber) message is shown on EICAS, continue with next step.

  5. Perform wiring check between SCU and Steering Pressure Switch 1 (S2P1).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, go to step 7.

  6. Set the NOSE STEER switch to ARMED.

    1. If the NOSE STEER FAIL (amber) message is not shown on EICAS, replace the NWS Solenoid Valve (L1).
    2. If the NOSE STEER FAIL (amber) message is shown on EICAS, replace the Steering Pressure Switch 1 (S2).

  7. Replace Steering Pressure Switch 1 (S2).
  8. Do close out.

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