# NTSB investigations: Allison 250-C30 series, 1997

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 FTW97LA356](https://openairdocs.org/ntsb/FTW97LA356.md): Sikorsky S-76A · Patterson, LA · Accident · Serious injuries · Limited investigation · Final report · Sep 22, 1997 · N517AL · Substantial damage
  > failure of the copilot to maintain a positive rate of climb after takeoff, which led to an inadvertent descent and collision with a crop of sugar cane and the ground. Factors relating to the accident were: darkness, fog, and the pilot-in-command's inadequate…
- [NTSB FTW97LA217](https://openairdocs.org/ntsb/FTW97LA217.md): Bell 206L-3 · Weston, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 1997 · N207DS · Substantial damage
  > the pilot's improper in-flight planning/decision and failure to maintain adequate altitude and/or clearance from rising mountainous/hilly terrain. The unfavorable wind condition and low airspeed were related factors.
- [NTSB CHI97FA149](https://openairdocs.org/ntsb/CHI97FA149.md): Bell 206L3 · Boise, ID · Accident · No injuries · Field investigation · Final report · May 27, 1997 · N35CH · Substantial damage
  > the improper torque meter installation by maintenance personnel, attempting flight with known discrepancies by the pilot-in-command and the check airman, and an improper autorotation by the pilot-in-command with improper oversight of the autorotation 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") = 1997
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03015'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03015&year=1997

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