# SDR CHQA200700036

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 14, 2007
- Submitted: July 16, 2007
- Operation: Air carrier
- Aircraft: N275SK
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145345
- Aircraft time: 17,251 hours, 14,132 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Proximity Sensor
- Condition: Dirty
- Location: Mlg
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHQA200700036

## Discrepancy

FLIGHT 3420 - IAH-BTR - DURING DESCENT BETWEEN 9,000 AND 10,000 FEET, THE FLAPS WERE SET TO 9 DEGREES AND THE LANDING GEAR WAS SELECTED DOWN.  AFTER THREE GREEN WITH DOWN INDICATIONS, EICAS MESSAGE LG AIR/GND FAIL APPEARED.  COMPLETED QRH.  DECLARED AN EMERGENCY.  LANDED WITHOUT INCIDENT.  MAINTENANCE CLEANED THE WOW PROX SENSORS AND RESET THE SYSTEM.

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