# NTSB investigations: Lycoming VO-435 series, MI

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 CEN13LA086](https://openairdocs.org/ntsb/CEN13LA086.md): Bell 47G-2 · Walkerville, MI · Accident · 1 fatal · Limited investigation · Final report · Dec 1, 2012 · N3755Z · Substantial damage
  > The pilot's failure to maintain altitude while maneuvering, which resulted in a collision with trees. Contributing to the accident was the pilot's decision to fly at a low altitude, which did not provide enough margin to recover from the descent.
- [NTSB CHI03LA184](https://openairdocs.org/ntsb/CHI03LA184.md): Bell 47G-5A · Sandusky, MI · Accident · No injuries · Limited investigation · Final report · Jun 28, 2003 · N8413D · Substantial damage
  > The failure of the ignition switch leading to an engine power loss in cruise flight and the subsequent high flare during autorotation. Factors contributing to the accident were the pilot's misjudgment of the landing flare and the unsuitable terrain…
- [NTSB CHI88DET05](https://openairdocs.org/ntsb/CHI88DET05.md): Bell 47J · Dowagiac, MI · Accident · No injuries · Final report · Aug 5, 1988 · N2838B · Substantial damage
  > Failure to maintian adequate rotor RPM by the unqualified pilot.
- [NTSB CHI88DEM05](https://openairdocs.org/ntsb/CHI88DEM05.md): Bell 47G-2A · Midland, MI · Accident · No injuries · Final report · May 31, 1988 · N440TG · Substantial damage
  > The plt rprtd that before takeoff, he checked the fuel gage & concluded there was enough fuel to dispense his load. However, after spraying out the load, he started to return to the landing site & then the eng lost power from fuel exhaustion. The helicopter…
- [NTSB CHI85FA198](https://openairdocs.org/ntsb/CHI85FA198.md): Bell 47G-2 · Burlington, MI · Accident · 1 fatal · Field investigation · Final report · May 16, 1985 · N3755J · Substantial damage
  > The helicopter was departing from a trailer which was sloped 5 degs to the left. During takeoff, the left skid lifted off first and the helicopter drifted to the right. The right skid caught on the trailer guides and the helicopter rolled over to the right.
- [NTSB CHI76FEC47](https://openairdocs.org/ntsb/CHI76FEC47.md): EL Tomcat MK-5A · Blissfield, MI · Accident · Minor injuries · Closed · Jun 16, 1976 · N9043T · Destroyed
- [NTSB CHI75FEM12](https://openairdocs.org/ntsb/CHI75FEM12.md): Bell 47G-2 · Paw Paw, MI · Accident · Minor injuries · Closed · Sep 21, 1974 · N7893B · Substantial damage
- [NTSB CHI73FEC08](https://openairdocs.org/ntsb/CHI73FEC08.md): Bell 47G-5A · Blissfield, MI · Accident · No injuries · Closed · Aug 28, 1972 · N2988W · Substantial damage
- [NTSB CHI67A0008](https://openairdocs.org/ntsb/CHI67A0008.md): Bell 47G-5 · Plymouth, MI · Accident · Minor injuries · Closed · Jul 21, 1966 · N1315X · Substantial damage
- [NTSB CHI65A0096](https://openairdocs.org/ntsb/CHI65A0096.md): Bell 47G3B · Bridgman, MI · Accident · No injuries · Closed · May 11, 1965 · N73231 · Substantial damage
- [NTSB UNK65X0382](https://openairdocs.org/ntsb/UNK65X0382.md): Bell 47G2A · Battle Creek, MI · Accident · Serious injuries · Closed · Oct 22, 1964 · N8458E · 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" = 'MI' 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=MI

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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.