# NTSB investigations: Lycoming TVO-435-GIA, MN

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 CEN13FA357](https://openairdocs.org/ntsb/CEN13FA357.md): Bell 47G-3B-1 · Maplewood, MN · Accident · 1 fatal · Field investigation · Final report · Jun 19, 2013 · N5024N · Destroyed
  > The loss of helicopter control for reasons that could not be determined because an examination of the helicopter and its systems revealed no malfunctions or failures that would have precluded normal operation.
- [NTSB CHI08CA254](https://openairdocs.org/ntsb/CHI08CA254.md): Bell 47G-3B · Kenyon, MN · Accident · No injuries · Data collection · Final report · Aug 14, 2008 · N47AH · Substantial damage
  > The pilot's inadequate preflight planning which resulted in the helicopter settling with power.
- [NTSB CHI98LA198](https://openairdocs.org/ntsb/CHI98LA198.md): Bell 47G · Le Center, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 10, 1998 · N73284 · Destroyed
  > the pilot's failure to maintain clearance with the wire. A factor associated with the accident was the wire which the helicopter contacted.
- [NTSB CHI91DER05](https://openairdocs.org/ntsb/CHI91DER05.md): Bell 47G3B1 · Lasalle, MN · Accident · No injuries · Final report · Jun 11, 1991 · N73284 · Substantial damage
  > The pilot's failure to maintain adequate clearance from the terrain. A related factor is the pilot's misjudged altitude above the crop.
- [NTSB CHI90DER03](https://openairdocs.org/ntsb/CHI90DER03.md): Bell 47G3B1 · Coon Rapids, MN · Accident · No injuries · Final report · Jul 31, 1990 · N4990H · Substantial damage
  > The pilot-in-command's inaccurate fuel consumption calculations and misjudgement of his fuel supply.
- [NTSB CHI84LA232](https://openairdocs.org/ntsb/CHI84LA232.md): Bell 47G · Fairfax, MN · Accident · Minor injuries · Limited investigation · Final report · Jun 13, 1984 · N501H · Substantial damage
  > The helicopter plt turned at the end of a spray run & the acft collided with a power line. He said that because of a quartering tailwind, the helicopter was in a nose high attitude & the tail rotor hit a wire. The plt was able to make an autorotation after…

## 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" = 'MN' 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 ('41526'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41526&state=MN

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