# NTSB investigations: Pratt & Whitney Canada PT6A-34AG: 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 ANC26FA054](https://openairdocs.org/ntsb/ANC26FA054.md): Air Tractor AT-502B · Forbes, MO · Accident · 1 fatal · Class 3 · Field · Preliminary report · Jun 16, 2026 · N503GK · Substantial damage
  > On June 15, 2026, about 2015 Central daylight time, an Air Tractor AT-502B airplane, N503GK, sustained substantial damage when it was involved in an accident near Forbes, Missouri. The pilot was fatally injured. The airplane was operated as a Title 14 Code of…
- [NTSB CEN23LA223](https://openairdocs.org/ntsb/CEN23LA223.md): Air Tractor AT-502B · Lake Village, AR · Accident · No injuries · Class 3 · Limited · Final report · Jun 3, 2023 · N509HB · Substantial damage
  > A reported loss of thrust for reasons that could not be determined.
- [NTSB ERA17WA055](https://openairdocs.org/ntsb/ERA17WA055.md): Ayres S2R · Valparaiso, Chile · Accident · 1 fatal · Foreign investigation · Nov 23, 2016 · N5532G · Substantial damage
  > On November 23, 2016, about 1410 universal coordinated time, an Ayres S2-R, United States registration N5532G, was destroyed when it impacted mountainous terrain near Paso Internacional Los Libertadores, Chile. The pilot was fatally injured. The flight…
- [NTSB WPR15LA048](https://openairdocs.org/ntsb/WPR15LA048.md): Air Tractor AT 502B · Somerton, AZ · Accident · 1 fatal · Limited investigation · Final report · Nov 30, 2014 · N946TR · Destroyed
  > A loss of airplane control for reasons that could not be determined based on 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52251')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '000'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/cases?engine=52251

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