# SDR MTNA20250121002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2025
- Submitted: January 23, 2025
- Operation: Air carrier
- Aircraft: [N800FX](https://openairdocs.org/aircraft/N800FX), registered now
- Make and model: Aerosp ATR 72-212
- Registry model: [Aerosp ATR 72-212](https://openairdocs.org/model/aerospatiale-atr-72-212) (OpenAirDocs)
- Aircraft serial: 336
- Aircraft time: 41,790 hours, 42,396 cycles
- System (JASC): [3230 · Landing Gear Retraction/Extension System](https://openairdocs.org/jasc/3230)
- Part: Selector Valve
- Part number: 1005383Y00
- Part serial: 239
- Condition: Failed
- Location: Zone 700
- Stage of operation: AP
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MTNA20250121002

## Discrepancy

DURING THE APPROACH TO LAND, LDG GEAR HANDEL FAILED FOLLOWED BY 3 UNLOCK LIGHTS ON BOTH SYSTEMS; LDG GEAR GRAVITY EXTENSION HAS BEEN USED FOR LANDING. PROBLEM WAS FOUND TO BE A FAILURE OF THE LANDING GEAR SELECTOR VALVE. A SERVICABLE VALVE WAS INSTALLED AND AIRCRAFT WAS RETURED TO SERVICE.

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