# SDR 9JLA2023042032326

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 1, 2023
- Submitted: April 20, 2023
- Operation: Air carrier
- Aircraft: [N776CJ](https://openairdocs.org/aircraft/N776CJ), registered now
- Make and model: Bombdr BD1001A10
- Aircraft serial: 20107
- Aircraft time: 5,219 hours, 2,502 cycles
- System (JASC): [3260 · Landing Gear Position and Warning](https://openairdocs.org/jasc/3260)
- Part: Position Sensor
- Part number: 401020101
- Part serial: 11241
- Condition: Faulty
- Stage of operation: LD
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9JLA2023042032326

## Discrepancy

THE FLIGHT CREW REPORTED THAT AFTER LANDING RECEIVING A BLUE PROX SYSTEM FAULT ANNUNCIATOR. THE MAINTENANCE PROVIDER TROUBLESHOT AND DETERMINED A DEFECTIVE LANDING GEAR PROXIMITY SWITCH AS AT FAULT. REMOVED AND REPLACED THE LEFT MAIN LANDING GEAR DOWNLOCK SENSOR WITH A NEW PROXIMITY SWITCH. RIGGING AND OPERATIONAL CHECKS WERE PERFORMED AND FOUND TO BE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.

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