# NTSB investigations: Allison 250-C47 series, TX

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 CEN25LA380](https://openairdocs.org/ntsb/CEN25LA380.md): Bell 407 · Decatur, TX · Accident · Minor injuries · Class 4 · Limited · Final report · Sep 16, 2025 · N407WA · Substantial damage
  > The instructor candidate’s erroneous operation of the throttle during an autorotation from altitude with power recovery, which resulted in a hard landing.
- [NTSB CEN24LA271](https://openairdocs.org/ntsb/CEN24LA271.md): Mcdonnell Douglas Helicopter 600N · Eagle Lake, TX · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 16, 2024 · N609RP · Destroyed
  > The operator’s improper installation of the fuel system, which resulted in fuel starvation, a loss of engine power, and impact with terrain.
- [NTSB CEN16LA058](https://openairdocs.org/ntsb/CEN16LA058.md): Mcdonnell Douglas Helicopter 600N · Angleton, TX · Accident · Minor injuries · Limited investigation · Final report · Dec 7, 2015 · N607BP · Substantial damage
  > A loss of control while hovering for reasons that could not be determined, because postaccident examination revealed no mechanical anomalies or failures that would have precluded normal operation.
- [NTSB CEN16LA027](https://openairdocs.org/ntsb/CEN16LA027.md): Bell 407 · San Antonio, TX · Accident · No injuries · Limited investigation · Final report · Nov 3, 2015 · N496AE · Substantial damage
  > The failure of the No. 3 tail rotor adapter and shaft due to a loss of torque on the retaining nut. Contributing to the accident was the lack of a requirement to inspect the tail rotor assembly for security in the helicopter manufacturer's maintenance manual…
- [NTSB GAA15CA002](https://openairdocs.org/ntsb/GAA15CA002.md): Bell 407 · Justin, TX · Accident · No injuries · Data collection · Final report · Mar 5, 2015 · N41BH · Substantial damage
  > Abnormal ground contact during an autorotation demonstration, resulting in a severed tailrotor driveshaft.
- [NTSB FTW04LA117](https://openairdocs.org/ntsb/FTW04LA117.md): Bell 407 · Hurst, TX · Accident · No injuries · Limited investigation · Final report · Apr 27, 2004 · N407BP · Substantial damage
  > The student pilot's excessive flare prior to touchdown during the practice autorotation which resulted in the tailboom stinger striking the ground. A contributing factor was the flight instructor's delay to take remedial action.

## 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."eventStateOrRegion" = 'TX' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03029'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03029&state=TX

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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.