# NTSB investigations: Pratt & Whitney R1340 series: Aerodynamic stall/spin

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 ERA25LA342](https://openairdocs.org/ntsb/ERA25LA342.md): Schweizer G-164B · Dover, DE · Accident · Minor injuries · Class 4 · Limited · Final report · Sep 9, 2025 · N8483K · Substantial damage
  > The pilot’s exceedance of the critical angle of attack which resulted in an aerodynamic stall at an altitude too low to recover.
- [NTSB CEN23FA332](https://openairdocs.org/ntsb/CEN23FA332.md): North American AT-6D · Oshkosh, WI · Accident · 2 fatal · Class 3 · Field · Final report · Jul 29, 2023 · N49961 · Destroyed
  > The pilot’s failure to maintain airspeed while maneuvering, which resulted in the exceedance of the airplane’s critical angle of attack and an aerodynamic stall/spin.
- [NTSB GAA19CA283](https://openairdocs.org/ntsb/GAA19CA283.md): Rockwell S2R · Grangeville, ID · Accident · No injuries · Data collection · Final report · May 24, 2019 · N5569X · Substantial damage
  > The pilot's exceedance of the airplane's critical angle of attack while turning at low altitude, which resulted in an aerodynamic stall.
- [NTSB GAA19CA271](https://openairdocs.org/ntsb/GAA19CA271.md): Ayres S 2R · Stuttgart, AR · Accident · No injuries · Data collection · Final report · May 17, 2019 · N5675X · Substantial damage
  > The pilot's exceedance of the airplane's critical angle of attack while maneuvering during an agricultural application flight, which resulted in an aerodynamic stall.
- [NTSB CEN18FA147](https://openairdocs.org/ntsb/CEN18FA147.md): North American SNJ 5 · Kingsville, TX · Accident · 2 fatal · Field investigation · Final report · Apr 25, 2018 · N12377 · Destroyed
  > The pilot's failure to maintain airspeed during a steep turn after takeoff, resulting in an exceedance of the airplane's critical angle of attack and a subsequent accelerated stall at an altitude too low for recovery.
- [NTSB CEN16FA328](https://openairdocs.org/ntsb/CEN16FA328.md): Aero Commander S2R · Center, CO · Accident · 1 fatal · Field investigation · Final report · Aug 19, 2016 · N8870Q · Destroyed
  > The pilot's failure to maintain airplane control during a low-level maneuver, which resulted in an aerodynamic stall.
- [NTSB CEN15LA345](https://openairdocs.org/ntsb/CEN15LA345.md): Air Tractor AT 401 · Nekoosa, WI · Accident · No injuries · Limited investigation · Final report · Aug 5, 2015 · N1539U · Substantial damage
  > The pilot’s inadequate preflight planning, which resulted in his attempt to take off for the agricultural application flight with the airplane over its maximum gross weight in high-density altitude conditions and led to the airplane’s degraded climb…
- [NTSB CEN15LA259](https://openairdocs.org/ntsb/CEN15LA259.md): Gulfstream-Schweizer A/C Gulfstream AM G 164B · Delaplaine, AR · Accident · Minor injuries · Limited investigation · Final report · Jun 3, 2015 · N8402K · Substantial damage
  > The pilot’s failure to establish a proper airspeed and angle-of attack during takeoff in elevated density altitude and light tailwind conditions, which resulted in an aerodynamic stall.
- [NTSB CEN14LA284](https://openairdocs.org/ntsb/CEN14LA284.md): Air Tractor AT-301 · Winner, SD · Accident · No injuries · Limited investigation · Final report · Jun 11, 2014 · N8564S · Substantial damage
  > The pilot's improper decision to attempt a takeoff with a tailwind and his failure to achieve the proper airspeed for liftoff, which resulted in the airplane exceeding its critical angle of attack and entering an aerodynamic stall shortly after liftoff.
- [NTSB CEN13LA504](https://openairdocs.org/ntsb/CEN13LA504.md): Gulfstream-Schweizer A/C Gulfstream AM G-164B · Walnut Ridge, AR · Accident · No injuries · Limited investigation · Final report · Aug 22, 2013 · N8402K · Substantial damage
  > The pilot's failure to properly set the engine power for takeoff, which resulted in the airplane subsequently settling into terrain.
- [NTSB CEN09FA425](https://openairdocs.org/ntsb/CEN09FA425.md): North American SNJ-5 · Simla, CO · Accident · 1 fatal · Field investigation · Final report · Jul 9, 2009 · N212TC · Destroyed
  > The pilot’s failure to maintain control of the airplane while practicing aerobatic maneuvers and his subsequent failure to recover from an inadvertent spin.
- [NTSB ERA09LA385](https://openairdocs.org/ntsb/ERA09LA385.md): Air Tractor AT-301 · Brinson, GA · Accident · 1 fatal · Limited investigation · Final report · Jul 7, 2009 · N8587S · Substantial damage
  > The pilot's failure to maintain adequate airspeed while maneuvering, which resulted in an aerodynamic stall. Contributing to the accident was the pilot's lack of experience in the make and model airplane.

## 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 ('52016')
    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" = '241'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/241/cases?engine=52016

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