# NTSB investigations: Allison 250 series: Loss of control in flight

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 ERA25LA137](https://openairdocs.org/ntsb/ERA25LA137.md): Beech A36TC · Lititz, PA · Accident · Serious injuries · Class 3 · Limited · Final report · Mar 9, 2025 · N347M · Destroyed
  > The pilot’s failure to maintain adequate airspeed after takeoff due to his distraction by the opening of the cabin door, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall/mush condition at too low of an…
- [NTSB GAA16CA293](https://openairdocs.org/ntsb/GAA16CA293.md): Bell 47G · Hastings, MN · Accident · No injuries · Data collection · Final report · Jun 8, 2016 · N25LB · Substantial damage
  > The pilot's failure to attain a positive rate of climb during takeoff from a service truck, which resulted in an impact with terrain and substantial damage to the tail boom and fuselage.
- [NTSB WPR14CA280](https://openairdocs.org/ntsb/WPR14CA280.md): Bell 47G · Gaston, OR · Accident · No injuries · Data collection · Final report · Jul 3, 2014 · N684PC · Substantial damage
  > The pilot's inability to maintain control of the helicopter as a result of a hydraulic hose becoming entangled around the right skid.
- [NTSB WPR12LA347](https://openairdocs.org/ntsb/WPR12LA347.md): Hiller UH-12D · Deer Island, OR · Accident · Minor injuries · Limited investigation · Final report · Aug 7, 2012 · N47035 · Substantial damage
  > A loss of helicopter control while maneuvering at low altitude for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB WPR09LA069](https://openairdocs.org/ntsb/WPR09LA069.md): Hughes 369 · Honiara, Solomon Islands · Accident · 1 fatal · Limited investigation · Final report · Dec 28, 2008 · N104BN · Destroyed
  > The pilot's failure to remove the tail rotor pedal lock before attempting flight, resulting in a loss of control.

## 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.engine_model_code IN ('03014', '03019')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '240'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/240/cases?engine=03014

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OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.