# NTSB investigations: Piper PA-20, WI

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 CEN25LA259](https://openairdocs.org/ntsb/CEN25LA259.md): Piper PA-20 · Oshkosh, WI · Accident · No injuries · Class 4 · Limited · Final report · Jul 18, 2025 · N7369K · Substantial damage
  > The pilot’s aggressive brake application which resulted in a loss of directional control and a ground loop.
- [NTSB CHI03LA308](https://openairdocs.org/ntsb/CHI03LA308.md): Piper PA-20 · Wausau, WI · Accident · No injuries · Limited investigation · Final report · Sep 8, 2003 · N5595H · Substantial damage
  > The excessive free play resulting in a loose tail wheel assembly and a failure of the flight crew to maintain directional control during the landing rollout.
- [NTSB CHI02FA200](https://openairdocs.org/ntsb/CHI02FA200.md): Piper PA-20 · Oshkosh, WI · Accident · No injuries · Field investigation · Final report · Jul 21, 2002 · N1592A · Substantial damage
  > Inadequate visual lookout by both the accident pilot and the pilot of the other airplane. An additional cause is the arrival procedure used which resulted in a congested traffic pattern and the subsequent inadequate visual separation of the airplanes. Factors…
- [NTSB CHI76DEP24](https://openairdocs.org/ntsb/CHI76DEP24.md): Piper PA-20 · Baraboo, WI · Accident · No injuries · Closed · Feb 8, 1976 · N7354K · Substantial damage
- [NTSB CHI72FEP37](https://openairdocs.org/ntsb/CHI72FEP37.md): Piper PA-20 · Twin Lakes, WI · Accident · No injuries · Closed · Apr 15, 1972 · N6978K · Substantial damage
- [NTSB CHI69A0095](https://openairdocs.org/ntsb/CHI69A0095.md): Piper PA-20 · Milwaukee, WI · Accident · 1 fatal · Closed · May 19, 1969 · N7604K · 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" = 'WI' 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 ('7102002'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=7102002&state=WI

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