# NTSB investigations: Allison 250 series, 1993

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 SEA94LA039](https://openairdocs.org/ntsb/SEA94LA039.md): Hiller-Soloy UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Dec 7, 1993 · N2297W · Substantial damage
  > Fuel exhaustion due to inadequate preflight and refueling not acomplished.
- [NTSB SEA94LA037](https://openairdocs.org/ntsb/SEA94LA037.md): Hiller UH-12D · Sublimity, OR · Accident · No injuries · Limited investigation · Final report · Nov 26, 1993 · N59366 · Substantial damage
  > The pilot's failure to maintain clearance from unmarked transmission wires. Factors include the pilot's inadequate visual lookout, and unmarked wires in the area of operation.
- [NTSB LAX94LA054](https://openairdocs.org/ntsb/LAX94LA054.md): Hiller UH-12E · Salinas, CA · Accident · Minor injuries · Limited investigation · Final report · Nov 20, 1993 · N161HA · Substantial damage
  > a fatigue failure of the torsion-tension bar pin due to fretting corrosion. A factor in this accident was an inadequate quality of material utilized in the manufacture of the pin.
- [NTSB SEA94LA029](https://openairdocs.org/ntsb/SEA94LA029.md): Bell 47G3B2 · Toledo, WA · Accident · No injuries · Limited investigation · Final report · Nov 9, 1993 · N8169J · Substantial damage
  > Transmission shear bolts failed causing a loss of power to the rotor system, and the pilot encountered unsuitable terrain during his autorotation attempt.

## 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") = 1993
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03014', '03019'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03014&year=1993

---
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.