# NTSB investigations: Lycoming VO-435 series, MO

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 CEN26LA234](https://openairdocs.org/ntsb/CEN26LA234.md): Bell 47G-2 · Troy, MO · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Jun 22, 2026 · N65520 · Substantial damage
  > On June 22, 2026, about 1840 central daylight time, a Bell 47G-2 helicopter, N65520, was substantially damaged when it was involved in an accident near Troy, Missouri. The pilot sustained serious injuries. The helicopter was operated as a Title 14 Code of…
- [NTSB CHI94LA133](https://openairdocs.org/ntsb/CHI94LA133.md): Bell 47-62 · Aurora, MO · Accident · No injuries · Limited investigation · Final report · Mar 5, 1994 · N6711D · Substantial damage
  > The dual students inadequate flare and the pilot in command's (flight instructor) delayed remedial action.
- [NTSB CHI91FA294](https://openairdocs.org/ntsb/CHI91FA294.md): Bell-K Copter 47D1 · Laurie, MO · Accident · 3 fatal · Field investigation · Final report · Sep 15, 1991 · N7768 · Destroyed
  > Poor judgement of the pilot, due to impairment from consumption of alcoholic beverage before flight, his intentional buzzing, and his inadequate visual lookout (failure to see-and-avoid power lines).
- [NTSB MKC82DA129](https://openairdocs.org/ntsb/MKC82DA129.md): Texas Helicopter OH-13E · 10 Sw Of Milan, MO · Accident · No injuries · Final report · Jul 20, 1982 · N38117 · Substantial damage
  > The plt had reduced the spray load from 90 to 50 gals to compensate for the increase in density altitude. The winds were blowing lightly during previous takeoffs but were calm during this takeoff. As the helicopter hovered forward during the takeoff it failed…
- [NTSB MKC79FCA14](https://openairdocs.org/ntsb/MKC79FCA14.md): Bell 47G-2 · Chesterfield, MO · Accident · Serious injuries · Closed · May 17, 1979 · N96194 · Substantial damage
- [NTSB MKC78FCA34](https://openairdocs.org/ntsb/MKC78FCA34.md): Bell 47G-2 · St Louis, MO · Accident · Serious injuries · Closed · Jun 15, 1978 · N88755 · Substantial damage
- [NTSB MKC78DCA30](https://openairdocs.org/ntsb/MKC78DCA30.md): Bell 47G-2 · Naylor, MO · Accident · No injuries · Closed · Jun 14, 1978 · N4690 · Substantial damage
- [NTSB MKC73FCA30](https://openairdocs.org/ntsb/MKC73FCA30.md): Bell 47G-5 · St Louis, MO · Accident · Minor injuries · Closed · Jun 24, 1973 · N7043J · Destroyed
- [NTSB MKC73AKO55](https://openairdocs.org/ntsb/MKC73AKO55.md): Bell 47J · Kansas City, MO · Accident · Minor injuries · Closed · Mar 2, 1973 · N6780D · Destroyed
- [NTSB MKC73DCG06](https://openairdocs.org/ntsb/MKC73DCG06.md): Bell 47G-5 · Forsyth, MO · Accident · No injuries · Closed · Sep 2, 1972 · N6203N · Substantial damage
- [NTSB MKC73FCG02](https://openairdocs.org/ntsb/MKC73FCG02.md): Bell 47J · Osage Beach, MO · Accident · Minor injuries · Closed · Aug 5, 1972 · N2881B · Substantial damage
- [NTSB MKC71FCA27](https://openairdocs.org/ntsb/MKC71FCA27.md): Bell 47G5 · Creve Coeur, MO · Accident · No injuries · Closed · Mar 20, 1971 · N7043J · Substantial damage
- [NTSB MKC70DCA14](https://openairdocs.org/ntsb/MKC70DCA14.md): Bell 47D1 · Perry, MO · Accident · No injuries · Closed · Jun 7, 1970 · N8117 · Destroyed
- [NTSB MKC67A0078](https://openairdocs.org/ntsb/MKC67A0078.md): Bell 47G-2 · West Plains, MO · Accident · Serious injuries · Closed · Jun 10, 1967 · N2813B · Destroyed

## 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" = 'MO' 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 ('41525'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41525&state=MO

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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.