# SDR 4DPA2025020500001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2025
- Submitted: February 5, 2025
- Operation: Air carrier
- Aircraft: [N961JX](https://openairdocs.org/aircraft/N961JX), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145605
- Aircraft time: 40,003 hours, 31,681 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Sensor
- Condition: Dirty
- Location: Zone 700
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/4DPA2025020500001

## Discrepancy

CREW REPORTED- UPON TAKE OFF AND RETRACTING THE GEAR, RECEIVED LG AIR/GND FAIL AS WELL AS E1-2 REVERSE DISAGREE MESSAGES. LANDING GEAR INDICATED UP AND LOCKED. RAN THE QRH FOR BOTH MESSAGES AND DECIDED TO RETURN TO LAS. NO EMERGENCY DECLARED. MESSAGES DISAPPEARED UPON LANDING. CORR ACTION- FOUND MULTIPLE CONNECTIONS ON PROXIMITY SWITCHES TO BE SATURATED WITH DIRT AND DEBRIS. CLEANED AND TESTED ALL PROXIMITY SENSORS ON NLG/ RH MLG/ LH MLG. PERFORMED GEAR SWINGS CHECKED GOOD. PERFORMED CHECK FLIGHT NO DEFECTS NOTED.

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