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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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Quick Links

08/16/19

Message Overview:

Fault Message:

STEERING CONTROL UNIT FAULT

Fault Code:

3250004DWY

Associated CAS:

NOSE STEER FAIL
(Caution)

Reporting LRU: Steering Control Unit (SCU)
System Description: 32-51-00
Schematic Diagram: 32-51-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 32-51-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

An internal fault has been detected in the Nose Wheel Steering Control Unit (SCU).

Possible Causes:

  • Steering Control Unit (SCU) (A36)
  • Electro-Hydraulic Servo Valve (L12)

Troubleshooting Tips:

Advisory Wire/Service Bulletin:

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

Forum Articles/Infoservice/Newsletter: None

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 Manifold AMM 32-51-17-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Steering Manifold AMM 32-51-17-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Re-seat SCU.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  2. Replace the SCU.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  3. Perform the Rigging of the NWS system.

    1. If system checks are good, do close out.
    2. If fault remains, continue with next step.

  4. Replace the EHSV (Steering Manifold).
  5. Do close out.

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