# NTSB investigations: Beech 99, MT

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 SEA04FA166](https://openairdocs.org/ntsb/SEA04FA166.md): Beech BE-99 · Neihart, MT · Accident · 2 fatal · Field investigation · Final report · Aug 18, 2004 · N199GL · Destroyed
  > The pilot's failure to maintain adequate terrain clearance during cruise, which resulted in the in-flight collision with mountainous terrain. Dark night conditions and mountainous terrain were contributing factors.
- [NTSB SEA99LA003](https://openairdocs.org/ntsb/SEA99LA003.md): Beech 99 · Missoula, MT · Accident · Minor injuries · Limited investigation · Final report · Oct 17, 1998 · N299GL · Substantial damage
  > The pilot-in-command's delayed remedial action in response to the co-pilot's improper landing flare, and the co-pilot's application of excessive (full nose-up) trim during the landing flare as taught in the operator's initial aircrew training program. Factors…
- [NTSB SEA94LA218](https://openairdocs.org/ntsb/SEA94LA218.md): Beech 99 · Helena, MT · Accident · No injuries · Limited investigation · Final report · Aug 20, 1994 · N14MV · Substantial damage
  > Landing gear locking mechanism overload and improper rigging.

## 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" = 'MT' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1154002'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=1154002&state=MT

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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.