# NTSB investigations: Pratt & Whitney R1340 series, WI

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 WPR24LA253](https://openairdocs.org/ntsb/WPR24LA253.md): Canadian Car & Foundry Harvard MK IV · Oshkosh, WI · Accident · No injuries · Class 4 · Limited · Final report · Jul 25, 2024 · N52494 · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll, which resulted in a ground loop.
- [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 CEN19CA237](https://openairdocs.org/ntsb/CEN19CA237.md): North American AT 6F · Oshkosh, WI · Accident · No injuries · Data collection · Final report · Jul 24, 2019 · N7976A · Substantial damage
  > The pilot's loss of directional control during landing with a quartering tailwind, which resulted in a runway excursion and subsequent substantial damage.
- [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 CEN11FA562](https://openairdocs.org/ntsb/CEN11FA562.md): Air Tractor AT-301 · Nekoosa, WI · Accident · No injuries · Field investigation · Final report · Aug 4, 2011 · N4345S · Substantial damage
  > A total loss of engine power during initial climb for undetermined reasons.
- [NTSB CEN09LA602](https://openairdocs.org/ntsb/CEN09LA602.md): Air Tractor AT-301A · New Miner, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 22, 2009 · N3651R · Substantial damage
  > A total loss of engine power due to the fatigue failure of the engine torsion shaft. Contributing to the accident was the chrome plating of the shaft by an undetermined maintenance/overhaul facility.
- [NTSB CEN09CA522](https://openairdocs.org/ntsb/CEN09CA522.md): Grumman Acft ENG Cor-Schweizer G-164A · Evansville, WI · Accident · No injuries · Data collection · Final report · Aug 12, 2009 · N9794 · Substantial damage
  > A jam of the elevator flight control for undetermined reasons.
- [NTSB CHI07LA219](https://openairdocs.org/ntsb/CHI07LA219.md): North American T-6G · Fond Du Lac, WI · Accident · No injuries · Limited investigation · Final report · Jul 23, 2007 · N22NA · Substantial damage
  > The loss of engine power due to the failure of the engine's master connecting rod which resulted in the forced landing. The road sign was a factor.
- [NTSB CHI02LA133](https://openairdocs.org/ntsb/CHI02LA133.md): Rockwell S-2R · Bancroft, WI · Accident · No injuries · Limited investigation · Final report · May 10, 2002 · N4224X · Substantial damage
  > The loss of engine power due to contamination of the fuel system from an unknown source and the blocked fuel filter. The rough terrain was a factor.
- [NTSB CHI01LA240](https://openairdocs.org/ntsb/CHI01LA240.md): Snow 600-S2C · Plainfield, WI · Accident · No injuries · Limited investigation · Final report · Jul 21, 2001 · N8703V · Substantial damage
  > The pilot not maintaining aircraft control while maneuvering on the aerial application flight. A factor to the accident was the encountered stall/mush at a low altitude.
- [NTSB CHI97LA263](https://openairdocs.org/ntsb/CHI97LA263.md): Grumman G-164B · Burlington, WI · Accident · No injuries · Limited investigation · Final report · Aug 16, 1997 · N7016Y · Substantial damage
  > the deer which contacted the airplane.
- [NTSB CHI96LA263](https://openairdocs.org/ntsb/CHI96LA263.md): Rockwell S-2D · Bancroft, WI · Accident · Minor injuries · Limited investigation · Final report · Jul 31, 1996 · N1768S · Substantial damage
  > the pilot's inadequate compensation for wind conditions and failure to maintain directional control, which resulted in a ground swerve, encounter with soft/sandy terrain, and a subsequent noseover. Factors relating to the accident were: the pilot's selection…
- [NTSB CHI94LA176](https://openairdocs.org/ntsb/CHI94LA176.md): Snow 600-S2C · Bancroft, WI · Accident · No injuries · Limited investigation · Final report · May 25, 1994 · N1659S · Substantial damage
  > the pilots failure to select carburetor heat during an extended descent, which resulted in loss of engine power. Factors were carburetor icing conditions and the presence of a ditch at the forced landing site.
- [NTSB CHI94LA148](https://openairdocs.org/ntsb/CHI94LA148.md): North American T-6G · Prairie Du Sac, WI · Accident · Minor injuries · Limited investigation · Final report · May 5, 1994 · N3715G · Substantial damage
  > inadequate compensation for wind conditions which resulted in a failure to maintain directional control. Factors associated with the accident were the crosswind conditions and the soft terrain.
- [NTSB CHI89DEP10](https://openairdocs.org/ntsb/CHI89DEP10.md): Air Tractor AT-301 · Plainfield, WI · Accident · 1 fatal · Final report · Aug 1, 1989 · N5044S · Destroyed
  > Failure of the pilot-in-command to maintain control of the aircraft while conducting aerial application maneuvers in close proximity to the terrain.
- [NTSB CHI83FA069](https://openairdocs.org/ntsb/CHI83FA069.md): North American T-6G · Genoa City, WI · Accident · 2 fatal · Field investigation · Final report · Jan 2, 1983 · N3168G · Destroyed
  > Prior to the accident the acft flew over the arpt at tree-top level with the gear retracted. The acft then landed. After spending about 15 min on the ground the plts took off to the west. The gear was retracted immediately after takeoff & the acft remained…
- [NTSB CHI81FEP34](https://openairdocs.org/ntsb/CHI81FEP34.md): Sikorsky HRS-1 · Rosedale, WI · Accident · No injuries · Closed · Jul 2, 1981 · N4782S · Destroyed
- [NTSB CHI77FEP41](https://openairdocs.org/ntsb/CHI77FEP41.md): Snow S2C · Nekoosa, WI · Accident · No injuries · Closed · Jun 25, 1977 · N1670S · Substantial damage
- [NTSB CHI74DEP51](https://openairdocs.org/ntsb/CHI74DEP51.md): Howard DGA15P · Franklin, WI · Accident · No injuries · Closed · May 19, 1974 · N9887H · Substantial damage
- [NTSB CHI66F0480](https://openairdocs.org/ntsb/CHI66F0480.md): Piper PA-28 · Milwaukee, WI · Accident · No injuries · Closed · Oct 17, 1965 · N7326W · 2 aircraft · Substantial damage
- [NTSB CHI66F0047](https://openairdocs.org/ntsb/CHI66F0047.md): No American SNJ-5 · Hales Corner, WI · Accident · Minor injuries · Closed · Jun 28, 1965 · N3262G · Substantial 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" = 'WI' 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=WI

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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.