# NTSB investigations: Allison 250 series: In flight collision with terrain/water

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 ANC07LA062](https://openairdocs.org/ntsb/ANC07LA062.md): Hiller UH-12E · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jul 10, 2007 · N146ET · Substantial damage
  > The pilot's failure to maintain clearance from a glacier, which resulted in a tail rotor strike during landing, and damage to the helicopter during an emergency descent/landing on rough/uneven terrain. Factors contributing to the accident were variable and…
- [NTSB IAD01FA066](https://openairdocs.org/ntsb/IAD01FA066.md): Hughes 369A · Perry, WV · Accident · 1 fatal · Field investigation · Final report · Jun 7, 2001 · N58963 · Destroyed
  > The pilot's continued VFR flight into instrument meteorological conditions, and his failure to maintain terrain clearance. A contributing factor was mountainous terrain.
- [NTSB CHI98LA339](https://openairdocs.org/ntsb/CHI98LA339.md): Enstrom 480 · Green Bay, WI · Accident · No injuries · Limited investigation · Final report · Sep 16, 1998 · N142CC · Substantial damage
  > the pilot's failure to maintain adequate rotor rpm during a practice autorotation.
- [NTSB LAX85LA002](https://openairdocs.org/ntsb/LAX85LA002.md): Hiller UH-12E · Firebaugh, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1984 · N161HA · Substantial damage
  > The acft collided with terrain while on an aerial application flt. The plt stated he, 'heard a loud bang' while spraying. Then the 'nose of the helicopter dove radically down', and he crashed into the field. Examination of the site revealed that one of the…

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03014', '03019')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 230))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03014&occurrence=230

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