# NTSB investigations: Pratt & Whitney R1340 series, 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 CEN24LA229](https://openairdocs.org/ntsb/CEN24LA229.md): Aero Commander S2R · White, SD · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 13, 2024 · N1746S · Substantial damage
  > A low-level collision and engine ingestion with ducks, which resulted in a total loss of engine power, a forced landing, and a subsequent nose over.
- [NTSB GAA15CA117](https://openairdocs.org/ntsb/GAA15CA117.md): Air Tractor AT 401 · Wall, SD · Accident · No injuries · Data collection · Final report · Jun 9, 2015 · N4549E · Substantial damage
  > The pilot's failure to adjust the airplane's useful load to compensate for the high temperature, which resulted in an insufficient climb rate to clear surrounding terrain, and a runway excursion.
- [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 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 CEN12LA357](https://openairdocs.org/ntsb/CEN12LA357.md): Rockwell International S-2R · Howard, SD · Accident · No injuries · Limited investigation · Final report · May 23, 2012 · N8421V · Substantial damage
  > A fractured fabricated aluminum oil line, which resulted in oil exhaustion followed by a forced landing.
- [NTSB CEN12CA313](https://openairdocs.org/ntsb/CEN12CA313.md): Ayres S2R-R1340 · Clear Lake, SD · Accident · Serious injuries · Data collection · Final report · May 23, 2012 · N30951 · Substantial damage
  > The pilot's failure to perform a detailed observation of the power lines before beginning the aerial application work, which resulted in an inadvertent collision with the two lower wires.
- [NTSB CEN11CA301](https://openairdocs.org/ntsb/CEN11CA301.md): Ayres S2R-R1340 · Estelline, SD · Accident · No injuries · Data collection · Final report · Apr 25, 2011 · N3104S · Substantial damage
  > The pilot's failure to maintain directional control of the airplane during takeoff.
- [NTSB CHI08CA245](https://openairdocs.org/ntsb/CHI08CA245.md): Air Tractor 301 · Herreid, SD · Accident · No injuries · Data collection · Final report · Aug 5, 2008 · N3161A · Substantial damage
  > Failure of one of the tailwheel bolts on landing and the pilot's subsequent inability to maintain directional control.
- [NTSB CHI03LA249](https://openairdocs.org/ntsb/CHI03LA249.md): North American AT-6D · Brookings, SD · Accident · No injuries · Limited investigation · Final report · Aug 7, 2003 · N9272K · Substantial damage
  > The inadequate fuel supply for the flight, and the inadequate preflight by the pilot resulting in exhaustion of the fuel supply and subsequent loss of engine power. The tree was a contributing factor.
- [NTSB CHI03LA243](https://openairdocs.org/ntsb/CHI03LA243.md): Rockwell International S-2R · Mitchell, SD · Accident · Minor injuries · Limited investigation · Final report · Aug 2, 2003 · N4923X · Substantial damage
  > The pilot's inadequate visual lookout and not maintaining clearance from the power line during the low level aerial application maneuver. A related factor was the power line.
- [NTSB CHI01LA251](https://openairdocs.org/ntsb/CHI01LA251.md): Aero Commander S2R · Pierre, SD · Accident · Serious injuries · Limited investigation · Final report · Jul 31, 2001 · N5551X · Destroyed
  > clearance not obtained by the pilot. A contributing factor was the transmission line.
- [NTSB CHI98LA217](https://openairdocs.org/ntsb/CHI98LA217.md): Air Tractor AT-301 · Ipswich, SD · Accident · No injuries · Limited investigation · Final report · Jun 25, 1998 · N31677 · Substantial damage
  > the pilot's inadequate evaluation of the weather conditions and his failure to maintain aircraft control which resulted in a stall/mush. Factors associated with the accident were the tailwind condition and the soft terrain.
- [NTSB CHI98LA118](https://openairdocs.org/ntsb/CHI98LA118.md): Air Tractor AT-401 · Highmore, SD · Accident · No injuries · Limited investigation · Final report · Apr 3, 1998 · N1008T · Substantial damage
  > the pilot failed to abort the takeoff in a timely manner and could not stop on the runway.
- [NTSB CHI97LA106](https://openairdocs.org/ntsb/CHI97LA106.md): Air Tractor AT-401 · Highmore, SD · Accident · Minor injuries · Limited investigation · Final report · Apr 18, 1997 · N1008P · Substantial damage
  > a premature lift-off of the airplane by the pilot in command.
- [NTSB CHI96LA167](https://openairdocs.org/ntsb/CHI96LA167.md): Air Tractor AT401 · Letcher, SD · Accident · No injuries · Limited investigation · Final report · May 20, 1996 · N1019X · Substantial damage
  > the pilot's inadequate evaluation of the severe weather condition. A factor was the weather conditions.
- [NTSB CHI95LA158](https://openairdocs.org/ntsb/CHI95LA158.md): Air Tractor AT301 · Clark, SD · Accident · No injuries · Limited investigation · Final report · May 24, 1995 · N4353S · Substantial damage
  > the failure of the pilot to refuel prior to fuel exhaustion. A factor in the accident was the pilot's excessive braking.
- [NTSB DEN85LA177](https://openairdocs.org/ntsb/DEN85LA177.md): Grumman G-164 · Platte, SD · Accident · No injuries · Limited investigation · Final report · Jul 1, 1985 · N6674K · Substantial damage
  > While the plt was spraying a field, the landing gear of the acft struck the center pivot of an irrigation structure. Later, when the acft was landed, the gear collapsed.
- [NTSB DEN84LA192](https://openairdocs.org/ntsb/DEN84LA192.md): Grumman G-164A · Murdo, SD · Accident · No injuries · Limited investigation · Final report · Jun 23, 1984 · N8974H · Substantial damage
  > The pilot reported the engine failed while he was in a procedure turn. The pilot made a forced landing in an open field and the acft nosed over. Examination of the engine after the accident revealed the engine 'swallowed an exhaust valve' that caused the…
- [NTSB DEN81DTK21](https://openairdocs.org/ntsb/DEN81DTK21.md): Grumman G-164C · Platte, SD · Accident · No injuries · Closed · Aug 14, 1981 · N6674K · Substantial damage
- [NTSB MKC79FTK15](https://openairdocs.org/ntsb/MKC79FTK15.md): Na Rockwell S-2R · Blunt, SD · Accident · No injuries · Closed · May 26, 1979 · N8501V · Minor damage

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

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