# NTSB investigations: Allison 250-C47 series, AZ

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 DEN08MA116](https://openairdocs.org/ntsb/DEN08MA116.md): Bell 407 · Flagstaff, AZ · Accident · 7 fatal · Major investigation · Final report · Jun 29, 2008 · N407GA · 2 aircraft · Destroyed
  > Both helicopter pilots’ failure to see and avoid the other helicopter on approach to the helipad. Contributing to the accident were the failure of N407GA’s pilot to follow flight arrival route guidelines, and the failure of N407MJ’s pilot to follow…
- [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 LAX98LA093](https://openairdocs.org/ntsb/LAX98LA093.md): Boeing MD600N · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Feb 3, 1998 · N9204D · Substantial damage
  > the attempt by flight test engineers to verify a height/velocity data point that was subsequently shown to be outside the aircraft's performance capabilities.

## 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" = 'AZ' 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=AZ

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