# NTSB investigations: Pratt & Whitney Canada PT6A-34AG, SD

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 CEN25LA221](https://openairdocs.org/ntsb/CEN25LA221.md): Air Tractor AT-402B · Pierre, SD · Accident · Serious injuries · Class 4 · Limited · Final report · Jun 24, 2025 · N107ML · Substantial damage
  > The pilot’s failure to maintain clearance with the power lines while maneuvering that resulted in an in-flight collision with the power lines and impact with terrain.
- [NTSB GAA19CA502](https://openairdocs.org/ntsb/GAA19CA502.md): Air Tractor AT502 · Onida, SD · Accident · No injuries · Data collection · Final report · Aug 16, 2019 · N500KA · Substantial damage
  > The pilot's failure to maintain clearance from power wires during agricultural application operations.
- [NTSB CEN17CA294](https://openairdocs.org/ntsb/CEN17CA294.md): Air Tractor AT 502B · Harrold, SD · Accident · Minor injuries · Data collection · Final report · Jul 26, 2017 · N421CA · Substantial damage
  > The pilot’s improper attempt at a low-pass maneuver, which resulted in a collision with a tractor.
- [NTSB CEN13LA391](https://openairdocs.org/ntsb/CEN13LA391.md): Air Tractor AT-402B · Ipswich, SD · Accident · No injuries · Limited investigation · Final report · Jul 2, 2013 · N2072D · Substantial damage
  > The pilot’s failure to obtain adequate airspeed during the takeoff roll, which resulted in an aerodynamic stall.
- [NTSB CEN09CA194](https://openairdocs.org/ntsb/CEN09CA194.md): Air Tractor AT-502B · Harrold, SD · Accident · Minor injuries · Data collection · Final report · Mar 6, 2009 · N648LA · Substantial damage
  > The pilot's failure to maintain clearance from the power lines during his turn to reverse course due to weather. Contributing to the accident was the reduced visibility at the time of the accident.

## 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" = 'SD' 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 ('52251'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=52251&state=SD

---
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.