# NTSB investigations: Allison 250 SER 400HP: 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 WPR23LA214](https://openairdocs.org/ntsb/WPR23LA214.md): Bell 206B · Filer, ID · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 3, 2023 · N205PA · Substantial damage
  > The pilot’s improper anti-torque pedal inputs during takeoff, which resulted in a loss of helicopter control during takeoff and subsequent dynamic rollover.
- [NTSB CEN18LA290](https://openairdocs.org/ntsb/CEN18LA290.md): Bell 206 · Todd Mission, TX · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2018 · N352CT · Substantial damage
  > The passenger’s inadvertent interference with the tail rotor pedals, which resulted in a loss of helicopter control during takeoff and the subsequent impact with terrain.
- [NTSB GAA15LA296](https://openairdocs.org/ntsb/GAA15LA296.md): Bell 206 · Ozark, AL · Accident · No injuries · Limited investigation · Final report · Sep 24, 2015 · N49660 · Substantial damage
  > The pilot's failure to maintain clearance from terrain while hovering, which resulted in the helicopter's skid impacting terrain, subsequent abnormal airframe vibrations, and a hard landing during the subsequent hovering autorotation.
- [NTSB ANC15CA012](https://openairdocs.org/ntsb/ANC15CA012.md): Bell 206B · Palmer, AK · Accident · No injuries · Data collection · Final report · Mar 10, 2015 · N86TA · Substantial damage
  > The pilot's failure to maintain control while hovering at a low altitude, which resulted in an impact with frozen lake ice. Contributing to the accident was the pilot's decision to operate the helicopter from the left seat contrary to the rotorcraft flight…
- [NTSB WPR11TA274](https://openairdocs.org/ntsb/WPR11TA274.md): Bell 206B · Franklin, CA · Accident · No injuries · Final report · Jun 21, 2011 · N38EA · Substantial damage
  > The student pilot's failure to maintain rotor rpm during the practice autorotation.
- [NTSB CEN11LA023](https://openairdocs.org/ntsb/CEN11LA023.md): Bell 206B · Newton, TX · Accident · Serious injuries · Limited investigation · Final report · Oct 13, 2010 · N499BH · Substantial damage
  > The pilot’s attempted takeoff with the fuel hose attached to the helicopter and the pilot and ground crew’s failure to accurately communicate.
- [NTSB LAX08FA233](https://openairdocs.org/ntsb/LAX08FA233.md): Hughes 369D · Price, UT · Accident · 3 fatal · Field investigation · Final report · Jul 19, 2008 · N400BE · Destroyed
  > The pilot's inadequate preflight performance planning for the takeoff and the loading that exceeded the lift performance capability of the helicopter.

## 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 ('03013', '03012')
    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=03013

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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.