# NTSB investigations: Pratt & Whitney R1340 series: Low altitude operation/event

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 WPR26LA312](https://openairdocs.org/ntsb/WPR26LA312.md): Schweizer G-164B · Olene, OR · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Aug 20, 2026 · N7501Q · Destroyed
  > On August 20, 2026, about 9:32 Pacific daylight time, a Schweizer Aircraft Corp., G-164B, N7501Q, was destroyed when it was involved in an accident near Orlene, Oregon. The pilot was seriously injured. The airplane was operated as a Title 14 Code of Federal…
- [NTSB CEN25LA191](https://openairdocs.org/ntsb/CEN25LA191.md): Air Tractor AT-401 · Hamlet, NE · Accident · No injuries · Class 4 · Limited · Final report · Jun 2, 2025 · N60057 · Substantial damage
  > The pilot's failure to maintain clearance from the power lines during low altitude maneuvering.
- [NTSB WPR24LA282](https://openairdocs.org/ntsb/WPR24LA282.md): Grumman Acft ENG Cor-Schweizer G-164B · Durham, CA · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 13, 2024 · N6633K · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines, which resulted in a wire strike.
- [NTSB CEN24LA029](https://openairdocs.org/ntsb/CEN24LA029.md): Ag-Cat G-164B · Abbeville, LA · Accident · No injuries · Class 4 · Limited · Final report · Oct 28, 2023 · N910MG · Substantial damage
  > The pilot’s failure to maintain clearance from a power line during an aerial application flight.
- [NTSB WPR23FA122](https://openairdocs.org/ntsb/WPR23FA122.md): Rockwell International S-2R · Willows, CA · Accident · 1 fatal · Class 3 · Field · Final report · Mar 8, 2023 · N8424V · Substantial damage
  > The pilot’s failure to maintain clearance from powerlines while flying under multiple conductors during a low-altitude aerial application flight, which resulted in propeller contact with a powerline and a subsequent loss of control.
- [NTSB CEN23LA063](https://openairdocs.org/ntsb/CEN23LA063.md): Rockwell International S2R-G6 · Mission, TX · Accident · No injuries · Class 4 · Limited · Final report · Dec 6, 2022 · N4205X · Substantial damage
  > The pilot's failure to maintain clearance from an electrical box.
- [NTSB CEN21FA355](https://openairdocs.org/ntsb/CEN21FA355.md): North American T-6G · Starkville, MS · Accident · 2 fatal · Class 3 · Field · Final report · Aug 4, 2021 · N7197C · Destroyed
  > The pilot’s failure to maintain clearance from trees while maneuvering at low altitude.
- [NTSB CEN20CA347](https://openairdocs.org/ntsb/CEN20CA347.md): Grumman G164 · Scottsbluff, NE · Accident · Minor injuries · Class 4 · Data collection · Final report · Aug 18, 2020 · N48416 · Substantial damage
  > The pilot’s loss of visual reference during agricultural low-level flight, resulting in collision with power lines.
- [NTSB GAA19CA270](https://openairdocs.org/ntsb/GAA19CA270.md): Grumman G164 · Lane City, TX · Accident · No injuries · Data collection · Final report · May 15, 2019 · N4865 · Destroyed
  > The pilot's failure to maintain clearance from power lines during low-altitude maneuvering.
- [NTSB CEN17CA120](https://openairdocs.org/ntsb/CEN17CA120.md): Aero Commander S2R · Fairmont, OK · Accident · Serious injuries · Data collection · Final report · Mar 2, 2017 · N1755S · Substantial damage
  > The pilot’s failure to maintain clearance from a power line while conducting agricultural spray operations.
- [NTSB GAA16CA399](https://openairdocs.org/ntsb/GAA16CA399.md): Air Tractor AT 301 · Bird Island, MN · Accident · No injuries · Data collection · Final report · Jul 27, 2016 · N7311X · Substantial damage
  > The pilot's diverted attention inside the cockpit and failure to maintain the airplane's altitude while maneuvering at a low altitude, resulting in an impact with terrain.
- [NTSB CEN16LA222](https://openairdocs.org/ntsb/CEN16LA222.md): North American AT-6D · Henley, MO · Accident · Serious injuries · Limited investigation · Final report · Jun 19, 2016 · N150U · Substantial damage
  > The pilot’s decision to conduct extended inverted flight, which resulted in a total loss of engine power due to fuel flow disruption. Contributing to the accident was his decision to conduct aerobatic maneuvers at low altitude, which precluded him from…
- [NTSB WPR16FA120](https://openairdocs.org/ntsb/WPR16FA120.md): Rockwell S2R · De Smet, ID · Accident · 1 fatal · Field investigation · Final report · Jun 6, 2016 · N4191X · Substantial damage
  > The pilot's inadequate visual lookout, which resulted in his failure to maintain clearance from guy wires during an aerial application flight. Contributing to the accident was the pilot's reduced ability to see the guy wires due to sun glare.
- [NTSB GAA15CA266](https://openairdocs.org/ntsb/GAA15CA266.md): Schweizer G 164B · Paxton, NE · Accident · Minor injuries · Data collection · Final report · Sep 16, 2015 · N3628Z · Substantial damage
  > The pilot's failure to maintain adequate distance from a power line during low altitude flight operations, which resulted in an impact with the power line, and subsequent impact with the ground.
- [NTSB CEN13LA533](https://openairdocs.org/ntsb/CEN13LA533.md): Grumman G-164A · Atlantic, IA · Accident · Minor injuries · Limited investigation · Final report · Sep 6, 2013 · N7843 · Destroyed
  > The pilot’s delay in releasing product to reduce the airplane’s weight and improve its climb performance, which was reduced because of the high density altitude.
- [NTSB CEN13LA375](https://openairdocs.org/ntsb/CEN13LA375.md): Air Tractor AT-301 · Colome, SD · Accident · No injuries · Limited investigation · Final report · Jun 26, 2013 · N3168X · Substantial damage
  > The loss of engine power for reasons that could not be determined because a postaccident engine run revealed no anomalies that would have precluded normal operation.
- [NTSB ERA13CA163](https://openairdocs.org/ntsb/ERA13CA163.md): Air Tractor AT-301 · Greenbrier, AL · Accident · No injuries · Data collection · Final report · Feb 24, 2013 · N7310N · Substantial damage
  > The pilot’s failure to maintain adequate clearance from trees.
- [NTSB CEN12LA440](https://openairdocs.org/ntsb/CEN12LA440.md): Grumman Acft ENG Cor-Schweizer G-164A · Darksville, MO · Accident · 1 fatal · Limited investigation · Final report · Jul 13, 2012 · N6846Q · Substantial damage
  > The pilot did not maintain clearance from a tree line at the completion of an agricultural spray run.
- [NTSB WPR12CA229](https://openairdocs.org/ntsb/WPR12CA229.md): Rockwell International S-2R · Royal City, WA · Accident · No injuries · Data collection · Final report · May 24, 2012 · N8468V · Substantial damage
  > The pilot’s failure to maintain adequate clearance from an object during an aerial application, which resulted in damage to the landing gear and led to the airplane ground looping during the subsequent landing.
- [NTSB ERA12CA050](https://openairdocs.org/ntsb/ERA12CA050.md): Air Tractor AT-301 · McAlpin, FL · Accident · No injuries · Data collection · Final report · Oct 24, 2011 · N3169C · Substantial damage
  > The pilot's misjudgment of the airplane's distance from known transmission lines.
- [NTSB CEN11CA330](https://openairdocs.org/ntsb/CEN11CA330.md): Air Tractor AT-301 · Garwood, TX · Accident · No injuries · Data collection · Final report · May 10, 2011 · N5097S · Substantial damage
  > The pilot's failure to maintain adequate clearance from transmission wires during a low-level maneuvering flight.
- [NTSB WPR11CA198](https://openairdocs.org/ntsb/WPR11CA198.md): Grumman G-164 · Princeton, CA · Accident · No injuries · Data collection · Final report · May 4, 2011 · N716Y · Substantial damage
  > The pilot’s failure to maintain adequate airspeed while maneuvering, resulting in an aerodynamic stall and collision with terrain.
- [NTSB CEN10CA553](https://openairdocs.org/ntsb/CEN10CA553.md): Gulfstream-Schweizer A/C Gulfstream AM G-164B · Blessing, TX · Accident · Serious injuries · Data collection · Final report · Sep 21, 2010 · N8157K · Substantial damage
  > The pilot's failure to maintain clearance from wires while maneuvering.
- [NTSB WPR10CA410](https://openairdocs.org/ntsb/WPR10CA410.md): Gulfstream-Schweizer A/C Gulfstream AM G-164B · Genesee, ID · Accident · No injuries · Data collection · Final report · Aug 18, 2010 · N8150K · Substantial damage
  > The pilot’s failure to maintain clearance from terrain during low-altitude maneuvering.
- [NTSB CEN10CA402](https://openairdocs.org/ntsb/CEN10CA402.md): Grumman Acft ENG Cor-Schweizer G-164B · Independence, IA · Accident · No injuries · Data collection · Final report · Jul 13, 2010 · N8260K · Substantial damage
  > The pilot's failure to pay attention to the power lines and his subsequent failure to maintain clearance from the corn field during the aerial application flight.
- [NTSB CEN10CA185](https://openairdocs.org/ntsb/CEN10CA185.md): Air Tractor AT-301 · Malden, MO · Accident · Minor injuries · Data collection · Final report · Apr 2, 2010 · N3653T · Substantial damage
  > The pilot's failure to maintain clearance from a tree during an aerial application flight.
- [NTSB WPR10FA162](https://openairdocs.org/ntsb/WPR10FA162.md): North American AT6 · Bakersfield, CA · Accident · 2 fatal · Field investigation · Final report · Mar 17, 2010 · N75AG · Substantial damage
  > The pilots did not maintain clearance from terrain for undetermined reasons.
- [NTSB CEN09CA514](https://openairdocs.org/ntsb/CEN09CA514.md): Air Tractor AT-301 · DeWitt, IL · Accident · Minor injuries · Data collection · Final report · Aug 10, 2009 · N5018S · Substantial damage
  > The pilot's failure to maintain clearance from the tree during the aerial application maneuver.
- [NTSB CEN09LA355](https://openairdocs.org/ntsb/CEN09LA355.md): Aero Commander S2R · Cordova, IL · Accident · 1 fatal · Limited investigation · Final report · Jun 12, 2009 · N1734S · Destroyed
  > The pilot’s failure to maintain clearance with terrain after clearing an obstacle during an agricultural application pass.
- [NTSB CHI08CA220](https://openairdocs.org/ntsb/CHI08CA220.md): Air Tractor AT-401 · Lake View, IA · Accident · Minor injuries · Data collection · Final report · Jul 26, 2008 · N9193F · Substantial damage
  > The pilot not obtaining/maintaining altitude/clearance from the power line while performing an aerial application maneuver.
- [NTSB CHI08CA176](https://openairdocs.org/ntsb/CHI08CA176.md): Aero Commander S2R · Clontarf, MN · Accident · No injuries · Data collection · Final report · Jul 6, 2008 · N5519X · Destroyed
  > The pilot's failure to maintain clearance from the power transmission lines. Contributing to the accident was the power transmission lines.
- [NTSB DEN08LA077](https://openairdocs.org/ntsb/DEN08LA077.md): Gulfstream-Schweizer G-164B · Angleton, TX · Accident · Minor injuries · Limited investigation · Final report · Apr 16, 2008 · N8237K · Destroyed
  > The pilot's inadequate visual lookout and his failure to maintain clearance from the tranmission lines. A factor in this accident was the unmarked transmission wires.

## 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" = '220'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/220/cases?engine=52016

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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.