# NTSB investigations: Allison 250-C20 series, 2024

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 CEN24LA377](https://openairdocs.org/ntsb/CEN24LA377.md): Mcdonnell Douglas Helicopter 369E · Manvel, TX · Accident · No injuries · Class 4 · Limited · Final report · Sep 30, 2024 · N8372F · Substantial damage
  > The pilot’s improper recovery from a practice autorotation which resulted in a hard landing. Contributing to the accident was the instructor’s inadequate supervision of the pilot receiving instruction.
- [NTSB WPR24LA319](https://openairdocs.org/ntsb/WPR24LA319.md): Bell 206L · Fern Prairie, WA · Accident · No injuries · Class 3 · Limited · Final report · Sep 26, 2024 · N9984K · Substantial damage
  > An aeroelastic interaction between the helicopter’s main rotor blades and nodal beam system, which resulted in oscillations that exceeded the design limits of the tailboom. Contributing to the accident was the failure of the main rotor blade manufacturer to…
- [NTSB ANC24FA089](https://openairdocs.org/ntsb/ANC24FA089.md): Bell 206B · King Salmon, AK · Accident · 1 fatal · Class 3 · Field · Final report · Sep 7, 2024 · N306FW · Substantial damage
  > The pilot’s decision to initiate the visual flight into instrument meteorological conditions, which resulted in his spatial disorientation, failure to maintain helicopter control and subsequent impact with water.
- [NTSB ERA24LA215](https://openairdocs.org/ntsb/ERA24LA215.md): Hughes 369 · Crestview, FL · Accident · No injuries · Class 4 · Limited · Final report · May 10, 2024 · N969VS · Substantial damage
  > The pilot’s improper flare, which resulted in a hard landing and the main rotor blades contacting the tail boom.
- [NTSB ANC24LA012](https://openairdocs.org/ntsb/ANC24LA012.md): Mcdonnell Douglas Helicopter 369E · Waialua, HI · Accident · No injuries · Class 4 · Limited · Final report · Jan 25, 2024 · N545PH · Substantial damage
  > The pilot's inability to maintain directional control after a skid got caught on a fence while he was maneuvering the helicopter for takeoff, which resulted in a dynamic roll-over.

## 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 year(c."eventDate") = 2024
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=2024

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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.