# NTSB investigations: Allison 250-C47 series, 2001

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 NYC02TA026](https://openairdocs.org/ntsb/NYC02TA026.md): Bell 407 · Whitley City, KY · Accident · Serious injuries · Final report · Nov 12, 2001 · N11HX · Substantial damage
  > The pilots decision to operate the helicopter at an airspeed in excess of the maximum demonstrated stable airspeed for the water bucket. A factor in the accident was the pilot did not follow the published emergency procedure.
- [NTSB LAX02IA013](https://openairdocs.org/ntsb/LAX02IA013.md): McDonnell Douglas 600N · Long Beach, CA · Incident · No injuries · Incident investigation · Final report · Oct 23, 2001 · N959SD · No damage
  > The fatigue failure of a 5/16-inch boom attach bolt was most probably caused by the angular misalignment between the tail boom bolt hole and the fuselage mounted nutplate.
- [NTSB LAX01FA277](https://openairdocs.org/ntsb/LAX01FA277.md): MD Helicopters 600N · Fountain Hills, AZ · Accident · Minor injuries · Field investigation · Final report · Aug 14, 2001 · N70457 · Substantial damage
  > the manufacturer's pilot's failure to maintain yaw control and main rotor speed while recovering from an unusual attitude induced by the customer pilot's inadequate control inputs while maneuvering at low altitude. The manufacturer's pilot's inadequate…
- [NTSB CHI01LA145](https://openairdocs.org/ntsb/CHI01LA145.md): Bell Helicopter 407 · Schoolcraft, MI · Accident · 1 fatal · Limited investigation · Final report · May 22, 2001 · N5259N · No damage
  > The pilot rated passenger failed to maintain clearance with the rotor blades as he exited the helicopter.
- [NTSB FTW01FA115](https://openairdocs.org/ntsb/FTW01FA115.md): Bell 407 · Vermillion 44 · Accident · No injuries · Field investigation · Final report · May 4, 2001 · N917AL · Substantial damage
  > Failure of the engine-to-transmission driveshaft coupling due to fatigue.
- [NTSB DEN01LA060](https://openairdocs.org/ntsb/DEN01LA060.md): Bell 407 · Jackson, WY · Accident · No injuries · Limited investigation · Final report · Mar 2, 2001 · N9HE · Substantial damage
  > The pilot's failure to maintain adequate lateral and vertical clearance during landing. Factors were the clouds and snow-covered high terrain.
- [NTSB LAX01TA092](https://openairdocs.org/ntsb/LAX01TA092.md): McDonnell Douglas 600N · San Diego, CA · Accident · No injuries · Final report · Feb 21, 2001 · N606BP · Substantial damage
  > The student pilot's improper use of the rotorcraft flight controls, and the instructor pilot's inadequate supervision of the maneuver.

## 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") = 2001
  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&year=2001

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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.