# NTSB investigations, WI: Unknown or undetermined

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 CEN26LA263](https://openairdocs.org/ntsb/CEN26LA263.md): Piper PA24 · Baraboo, WI · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Jul 16, 2026 · N8606P · Substantial damage
  > On July 16, 2026, about 1508 central daylight time, a Piper PA-24-260 airplane, N8606P, sustained substantial damage when it was involved in an accident near Baraboo, Wisconsin. The pilot sustained serious injuries. The airplane was operated as a Title 14…
- [NTSB CEN26FA050](https://openairdocs.org/ntsb/CEN26FA050.md): Socata TBM 700 · Monroe, WI · Accident · 2 fatal · Class 3 · Field · Preliminary report · Nov 24, 2025 · N700PT · Substantial damage
  > On November 24, 2025, about 1713 central standard time (CST), a Socata TBM 700 airplane, N700PT, was destroyed when it was involved in an accident near Monroe, Wisconsin. The pilot and pilot-rated passenger sustained fatal injuries. The airplane was operated…
- [NTSB CEN25LA149](https://openairdocs.org/ntsb/CEN25LA149.md): Pphu Ekolot KR-030 Topaz · Platteville, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Apr 8, 2025 · N568RD · Substantial damage
  > The pilot’s failure to maintain clearance from terrain for reasons which could not be determined.
- [NTSB CEN24LA245](https://openairdocs.org/ntsb/CEN24LA245.md): Raytheon A36 · Land O' Lakes, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 30, 2024 · N47RT · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB CEN24LA119](https://openairdocs.org/ntsb/CEN24LA119.md): Zenith Stol CH750 · Sextonville, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 23, 2024 · N750WW · Substantial damage
  > A loss of engine power for reasons that could not be determined, followed by a loss of control and subsequent impact with terrain.
- [NTSB CEN23LA099](https://openairdocs.org/ntsb/CEN23LA099.md): Piper PA-28-160 · Eau Claire, WI · Accident · No injuries · Class 3 · Limited · Final report · Feb 5, 2023 · N9770J · Destroyed
  > The engine fire that began for undetermined reasons following numerous engine start attempts.
- [NTSB CEN22LA103](https://openairdocs.org/ntsb/CEN22LA103.md): Cessna 120 · Sturtevant, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Jan 18, 2022 · N90129 · Substantial damage
  > The pilot’s loss of directional control during the takeoff for reasons that could not be determined based on the available evidence, which resulted in a runway excursion.
- [NTSB CEN21LA367](https://openairdocs.org/ntsb/CEN21LA367.md): Pulsar Sport 150 · Osceola, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 9, 2021 · N997EM · Substantial damage
  > The total loss of engine power for undermined reasons based on available information
- [NTSB CEN20LA179](https://openairdocs.org/ntsb/CEN20LA179.md): Cessna P210 · Burlington, WI · Accident · 1 fatal · Class 3 · Limited · Final report · May 15, 2020 · N1JA · Substantial damage
  > The pilot did not maintain a safe altitude during the visual approach, and subsequently lost control which resulted an impact with trees and terrain.
- [NTSB CEN19FA018](https://openairdocs.org/ntsb/CEN19FA018.md): Eurocopter AS350 · Odanah, WI · Accident · 1 fatal · Field investigation · Final report · Oct 29, 2018 · N910S · Destroyed
  > The pilot's loss of helicopter control for undetermined reasons.
- [NTSB CEN14LA537](https://openairdocs.org/ntsb/CEN14LA537.md): Hughes TH 55A · Hudson, WI · Accident · Minor injuries · Limited investigation · Final report · Jun 10, 2014 · N5335U · Substantial damage
  > The nonhelicopter-rated pilot’s operation of the helicopter and its subsequent collision with trees during takeoff for reasons that could not be determined based on the available evidence.

## 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" = 'WI' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '000' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent"))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/sequence?state=WI

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