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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

08/08/19

Message Overview:

Fault Message:

LEFT MLG WOW SENSOR A DISAGREE

Fault Code:

3230153EL

Associated CAS:

None

Reporting LRU: Landing Gear Electronic Control Unit (LGECU)
System Description: 32-61-00
Schematic Diagram: 32-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 32-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

There is a disagree with the Left Main Landing Gear (MLG) Weight-On-Wheel (WOW) Sensor A.

Possible Causes:

  • Left Main Gear Weight-On-Wheels (WOW) A Proximity Sensor (MT31)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

NOTE: The CAIMS messages associated with this task are as follows:

Quick Links:

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 ]
Landing Gear Safety Precautions AMM 32-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Main Gear Harness AMM 32-11-13-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the MLG Harness Assembly AMM 32-11-13-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Operational Test of the Position Indication System AMM 32-61-00-710-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Adjustment of the Main-Gear Weight-On-Wheels
(WOW) Proximity-Sensors		 AMM 32-61-01-820-806 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Main Landing Gear Assembly CMM 32-10-11 [ 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:

  1. Check if there is damage to the sensor and main gear harness.

    1. If there is damage to the sensor or harness, replace the outboard main gear harness and do close out.
    2. If there is no damage, continue with the next step.

  2. Check if there is damage to the outboard WOW sensor target.

    1. If there is damage to the WOW sensor target, replace the outboard WOW sensor target and do close out.
    2. If there is no damage, continue with the next step.

  3. Perform the adjustment of the main-gear weight-on-wheels (WOW) proximity-sensor AMM task 32-61-01-820-806. Is the fault still present?

    1. If NO, do close out.
    2. If YES, continue with next step.

  4. Access and disconnect the outboard WOW sensors. Perform a continuity check as follows:

    From To Result
    PW3-A PW3-B

    1. If there is no continuity, replace the outboard main gear harness and continue with next step.
    2. If there is continuity, continue with next step.

  5. Perform a continuity check as follows:

    From To Result
    A52AP1-J2 J311-57
    A52AP1-K2 J311-58
    P311-57 JW3-A
    P311-58 JW3-B

    1. If there is no continuity, repair defective wiring as required and do close out.
    2. If there is continuity, continue with the next step.

  6. Perform a continuity check as follows:

    From To Result
    A52AP1-J2 Ground
    A52AP1-K2 Ground

    1. If there is continuity, repair defective wiring as required and do close out.
    2. If there is no continuity, continue with next step.

  7. Replace the Outboard WOW Sensor and target.
  8. Do close out.

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