# NTSB investigations: Pratt & Whitney R1340 series, ND

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 CEN25LA306](https://openairdocs.org/ntsb/CEN25LA306.md): Air Tractor AT-301 · Davenport, ND · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Aug 7, 2025 · N23069 · Substantial damage
  > On August 6, 2025, at 2035 central daylight time, an Air Tractor Inc AT-301 airplane, N23069, was substantially damaged when it was involved in an accident near Davenport, North Dakota. The commercial pilot sustained serious injuries. The airplane was…
- [NTSB CEN23LA347](https://openairdocs.org/ntsb/CEN23LA347.md): Air Tractor AT-401 · Jamestown, ND · Accident · No injuries · Class 4 · Limited · Final report · Aug 3, 2023 · N6015W · Substantial damage
  > The pilot’s failure to maintain proper airspeed after liftoff, which resulted in the airplane exceeding its critical angle of attack and an aerodynamic stall.
- [NTSB CEN19LA156](https://openairdocs.org/ntsb/CEN19LA156.md): Rockwell S 2R · Oakes, ND · Accident · No injuries · Class 3 · Limited · Final report · May 25, 2019 · N4907X · Substantial damage
  > The failure of the helical cam gear of the engine assembly due to fatigue cracks in the gear teeth, which resulted in a total loss of engine power.
- [NTSB CEN16LA314](https://openairdocs.org/ntsb/CEN16LA314.md): Aero Commander S2R · Valley City, ND · Accident · No injuries · Limited investigation · Final report · Aug 5, 2016 · N5599X · Substantial damage
  > The pilot's inadequate preflight inspection and fuel planning, which resulted in a loss of engine power due to fuel exhaustion.
- [NTSB CEN11LA598](https://openairdocs.org/ntsb/CEN11LA598.md): Air Tractor AT-301 · Edgeley, ND · Accident · No injuries · Limited investigation · Final report · Aug 13, 2011 · N73071 · Substantial damage
  > The loss of engine power for reasons that could not be determined because postaccident examination of the airplane and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN11CA570](https://openairdocs.org/ntsb/CEN11CA570.md): Air Tractor AT-301 · Minot, ND · Accident · No injuries · Data collection · Final report · Aug 3, 2011 · N8764S · Substantial damage
  > The pilot's failure to maintain directional control during the crosswind landing, resulting in a ground loop.
- [NTSB CEN10CA412](https://openairdocs.org/ntsb/CEN10CA412.md): Air Tractor AT-301 · Edmore, ND · Accident · No injuries · Data collection · Final report · Jul 17, 2010 · N8774S · Substantial damage
  > The pilot's selection of unsuitable terrain for landing.
- [NTSB CHI07CA209](https://openairdocs.org/ntsb/CHI07CA209.md): Air Tractor AT-301 · Lignite, ND · Accident · Serious injuries · Data collection · Final report · Jul 15, 2007 · N8841S · Substantial damage
  > The pilot's poor in-flight planning and failure to maintain control of the airplane when he encountered his own vortex turbulence at a low altitude.
- [NTSB CHI07LA162](https://openairdocs.org/ntsb/CHI07LA162.md): Aero Commander S2R · Watford City, ND · Accident · 1 fatal · Limited investigation · Final report · Jun 5, 2007 · N8835Q · Destroyed
  > The agricultural pilot's failure to maintain clearance from the terrain while maneuvering to avoid power lines. The power lines were a contributing factor in the accident.
- [NTSB CHI05LA211](https://openairdocs.org/ntsb/CHI05LA211.md): Grumman G-164A · Buchanan, ND · Accident · Serious injuries · Limited investigation · Final report · Aug 4, 2005 · N6858Q · Destroyed
  > The pilot failed to maintain obstacle clearance from the power lines. Factors included the glare on the windshield and the power lines.
- [NTSB CHI05LA188](https://openairdocs.org/ntsb/CHI05LA188.md): Air Tractor AT-301 · Langdon, ND · Accident · 1 fatal · Limited investigation · Final report · Jul 15, 2005 · N3159N · Destroyed
  > The pilot's failure to maintain clearance from the terrain while attempting an abrupt turning maneuver at a low altitude.
- [NTSB CHI05CA183](https://openairdocs.org/ntsb/CHI05CA183.md): Rockwell S-2R · Guelph, ND · Accident · Serious injuries · Data collection · Final report · Jul 12, 2005 · N4232X · Substantial damage
  > The pilot's failure to maintain clearance to the guy wire during the agricultural application pass. Contributing factors were the guy wire, and low altitude flight.
- [NTSB CHI02LA152](https://openairdocs.org/ntsb/CHI02LA152.md): Grumman G-164A · Langdon, ND · Accident · No injuries · Limited investigation · Final report · Jun 5, 2002 · N7835 · Destroyed
  > The pilot did not maintain directional control while taxiing. A contributing factor was the wind gust condition present at the time of the accident.
- [NTSB CHI99LA258](https://openairdocs.org/ntsb/CHI99LA258.md): Air Tractor 401B · Mccanna, ND · Accident · Serious injuries · Limited investigation · Final report · Jul 24, 1999 · N6006A · Substantial damage
  > the inadvertent stall by the pilot.
- [NTSB CHI99LA215](https://openairdocs.org/ntsb/CHI99LA215.md): Grumman-Schweizer G-164B · Page, ND · Accident · No injuries · Limited investigation · Final report · Jul 3, 1999 · N6633K · Substantial damage
  > the pilot's failure to compensate for the wind conditions. Factors were the sudden windshift and the crops.
- [NTSB CHI98LA305](https://openairdocs.org/ntsb/CHI98LA305.md): Air Tractor AT-301 · Edgeley, ND · Accident · No injuries · Limited investigation · Final report · Aug 9, 1998 · N4443S · Substantial damage
  > The pilot's failure to maintain flying airspeed resulting in a stall/mush condition during the initial climb. Contributing factors were the high density altitude, high aircraft weight, and pilot's delayed jettison of the load, as well as the roadway and crop.
- [NTSB CHI98LA306](https://openairdocs.org/ntsb/CHI98LA306.md): Rockwell S2R · Kindred, ND · Accident · Minor injuries · Limited investigation · Final report · Aug 8, 1998 · N5524X · Destroyed
  > the pilot did not maintain clearance with obstructions along his flight path.
- [NTSB CHI98LA301](https://openairdocs.org/ntsb/CHI98LA301.md): Grumman-Schweizer G-164A · La Moure, ND · Accident · No injuries · Limited investigation · Final report · Aug 4, 1998 · N8693H · Substantial damage
  > a loss of engine power due to undetermined reasons.
- [NTSB CHI98LA241](https://openairdocs.org/ntsb/CHI98LA241.md): Rockwell S-2R · Fort Ransom, ND · Accident · No injuries · Limited investigation · Final report · Jul 7, 1998 · N4232X · Substantial damage
  > A loss of engine power due to fuel exhaustion. Factors contributing to this accident were the pilot's failure to ensure the airplane had enough fuel to complete the flight, and the fence.
- [NTSB CHI95LA260](https://openairdocs.org/ntsb/CHI95LA260.md): Schweizer G-164A-450 · Grand Forks, ND · Accident · Minor injuries · Limited investigation · Final report · Aug 5, 1995 · N7994 · Substantial damage
  > the pilot's failure to maintain clearance with transmission wires. A factor in the accident was the sunglare.
- [NTSB CHI92DTG05](https://openairdocs.org/ntsb/CHI92DTG05.md): Air Tractor AT-301 · Alice, ND · Accident · Minor injuries · Final report · Sep 10, 1992 · N8823S · Substantial damage
  > Complete loss of engine power as a result of the partial failure of four pistons.
- [NTSB CHI91DTG07](https://openairdocs.org/ntsb/CHI91DTG07.md): Ayres S2R · Drayton, ND · Accident · No injuries · Final report · Aug 7, 1991 · N4010H · Substantial damage
  > Misjudged clearance by the pilot. A factor related to the accident is overconfidence in personal ability.
- [NTSB CHI91DTG06](https://openairdocs.org/ntsb/CHI91DTG06.md): Ayres S2R · Drayton, ND · Accident · No injuries · Final report · Jul 20, 1991 · N8988Q · Substantial damage
  > That the pilot did not perform any preflight planning, and did not use the aircraft performance data.
- [NTSB DEN86LA174](https://openairdocs.org/ntsb/DEN86LA174.md): Schweizer G-164A · La Moure, ND · Accident · No injuries · Limited investigation · Final report · Jun 24, 1986 · N6838Q · Substantial damage
  > According to the plt, during a swath run, the acft he was piloting encountered 'bad air' and descended until the wings and wheels contacted the crop of grain he was spraying. The plt stated the acft stalled and contacted the ground.
- [NTSB DEN84LA206](https://openairdocs.org/ntsb/DEN84LA206.md): Grumman G-164A · Wyndmere, ND · Accident · No injuries · Limited investigation · Final report · Jul 1, 1984 · N4638 · Substantial damage
  > Sod was worn from the middle of the strip & the strip was wet. Therefore, the plt elected to use the left side of the sod strip for takeoff. During the takeoff roll, the left spray boom dragged into wheat that was growing beside the rwy & the acft veered…

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

This list as a web page: https://openairdocs.org/ntsb?engine=52016&state=ND

---
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.