08/09/19
Message Overview:
Fault Message:
LEFT MLG WOW SENSOR B DISAGREE
Fault Code:
3231139EL
Associated CAS:
| 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 Gear Weight On Wheel Sensor B.
Possible Causes:
- Left Main Gear Weight On Wheel (WOW) B Sensor (MT29)
- 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:
- Check if there is damage to the sensor and main gear harness.
- If there is damage to the sensor or harness, replace the inboard main gear harness and do close out.
- If there is no damage, continue with the next step.
- Check if there is damage to the inboard WOW sensor target.
- If there is damage, replace WOW sensor target and do close out.
- If there is no damage, continue with the next step.
- 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?
- If NO, do close out.
- If YES, continue with next step.
- Access and disconnect the outboard WOW sensors. Perform a continuity check as follows:
From To Result PW4-A PW4-B - If there is no continuity, go to step 7.
- If there is continuity, continue with next step.
- Perform the continuity check as follows:
From To Result A52AP1-A2 J313-46 A52AP1-B2 J313-47 P313-46 JW4-A P313-47 JW4-B - If there is no continuity, repair defective wiring as required and do close out.
- If there is continuity, continue with the next step.
- Perform a continuity check as follows:
From To Result A52AP1-A2 Ground A52AP1-B2 Ground - If there is continuity, repair defective wiring as required and do close out.
- If there is no continuity, continue with next step.
- Replace the Left Main Gear Weight On Wheels (WOW) Sensor.
- Do close out.