# NTSB investigations: Bell Helicopter Textron 206L-1: Loss of tail rotor effectiveness

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB CEN15FA003](https://openairdocs.org/ntsb/CEN15FA003.md): Bell Helicopter Textron 206L 1 · Wichita Falls, TX · Accident · 3 fatal · Field investigation · Final report · Oct 4, 2014 · N335AE · Destroyed
  > The pilot’s failure to maintain yaw control when he applied power to execute a go-around at a low airspeed in dark, night conditions, which resulted in a rapid, uncommanded right yaw due to a loss of tail rotor effectiveness.
- [NTSB CEN13LA310](https://openairdocs.org/ntsb/CEN13LA310.md): Bell Helicopter Textron 206L-1 · La Junta, CO · Accident · No injuries · Limited investigation · Final report · May 7, 2013 · N20Z · Substantial damage
  > The pilot's inadequate compensation for wind during low-altitude operations, which resulted in a loss of tail rotor effectiveness.
- [NTSB CEN09LA413](https://openairdocs.org/ntsb/CEN09LA413.md): Bell Helicopter Textron 206L-1 · Breckenridge, CO · Accident · Serious injuries · Limited investigation · Final report · Jul 2, 2009 · N38AZ · Substantial damage
  > The pilot's failure to maintain directional control while maneuvering due to a loss of tail rotor effectiveness. Contributing to the accident was the pilot's failure to monitor wind direction while operating in the "Critical Wind Azimuth Area."

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1182107')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s.case_mkey = x.case_mkey AND s.aircrafts_position = x.position AND s."tier2Number" = '242' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/242/sequence?model=1182107

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