# NTSB investigations: Amateur-built UNKNOWN ENG, 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 CEN24LA330](https://openairdocs.org/ntsb/CEN24LA330.md): Esqual VM1 · Oshkosh, WI · Accident · No injuries · Class 4 · Limited · Final report · Aug 27, 2024 · N151GH · Substantial damage
  > The pilot’s premature rotation during takeoff which resulted in the airplane settling back to the runway and the subsequent separation of the left wheel.
- [NTSB CEN24LA119](https://openairdocs.org/ntsb/CEN24LA119.md): Zenith Stol CH750 · Sextonville, WI · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 23, 2024 · N750WW · Substantial damage
  > A loss of engine power for reasons that could not be determined, followed by a loss of control and subsequent impact with terrain.
- [NTSB CEN24FA024](https://openairdocs.org/ntsb/CEN24FA024.md): Lancair 320 · Manitowoc, WI · Accident · 1 fatal · Class 3 · Field · Final report · Oct 25, 2023 · N320P · Substantial damage
  > The pilot’s decision to continue the visual flight rules flight into instrument meteorological conditions and failure to maintain clearance from trees and terrain during an unapproved instrument approach. Contributing to the accident was the pilot’s…
- [NTSB CEN23LA037](https://openairdocs.org/ntsb/CEN23LA037.md): Fairchild SA227-AT · Pewaukee, WI · Accident · Minor injuries · Class 3 · Limited · Final report · Nov 15, 2022 · N247DH · Substantial damage
  > The flight crew’s failure to maintain adequate airspeed and their exceedance of the airplane’s critical angle of attack during the instrument approach, which resulted in an aerodynamic stall. Contributing to the accident was an undetermined anomaly in the…
- [NTSB CEN21LA336](https://openairdocs.org/ntsb/CEN21LA336.md): Driver RV-7 · Oshkosh, WI · Accident · No injuries · Class 3 · Limited · Final report · Jul 23, 2021 · N977RV · 2 aircraft · Substantial damage
  > The RV-8 pilot’s failure to account for the position of the RV-7 behind him during the landing roll in a staggered landing formation, which resulted in a ground collision of the two airplanes. Contributing to the accident was the self-induced pressure created…
- [NTSB WPR18FA200](https://openairdocs.org/ntsb/WPR18FA200.md): De Havilland DH112 Venom · Sheboygan, WI · Accident · 1 fatal · Field investigation · Final report · Jul 20, 2018 · N747J · Destroyed
  > The airplane's encounter with wake turbulence from the lead airplane in the formation flight, which resulted in a compressor stall and the airplane's subsequent inability to climb.
- [NTSB CEN16LA302](https://openairdocs.org/ntsb/CEN16LA302.md): Sonex Waiex · Fond du Lac, WI · Accident · Serious injuries · Limited investigation · Final report · Aug 3, 2016 · N12YX · Substantial damage
  > A partial loss of engine for reasons that could not be determined during an examination of the engine.
- [NTSB GAA15CA279](https://openairdocs.org/ntsb/GAA15CA279.md): Brunzlick Larry R Seawind 3000 Experim · Pelican Lake, WI · Accident · No injuries · Data collection · Final report · Sep 22, 2015 · N896CB · Substantial damage
  > Abnormal runway contact which precipitated a loss of directional control and impact with water.
- [NTSB CEN15LA351](https://openairdocs.org/ntsb/CEN15LA351.md): Roberts Bruce W Vans Aircraft RV 9A · Land O' Lakes, WI · Accident · Minor injuries · Limited investigation · Final report · Jul 19, 2015 · N142DD · Substantial damage
  > The pilot’s failure to maintain a proper descent rate, which resulted in a hard landing.
- [NTSB GAA15CA180](https://openairdocs.org/ntsb/GAA15CA180.md): Pietenpol AIR Camper · Burlington, WI · Accident · No injuries · Data collection · Final report · Jul 9, 2015 · N29NX · Substantial damage
  > The student pilot's failure to maintain pitch control during the landing touchdown, resulting in a hard landing.
- [NTSB CEN15LA020](https://openairdocs.org/ntsb/CEN15LA020.md): Kovars Gary D Zenith Zodiak 601XL · Richland Center, WI · Accident · No injuries · Limited investigation · Final report · Oct 9, 2014 · N601GK · Substantial damage
  > The loss of engine power due to carburetor icing.
- [NTSB CEN13LA502](https://openairdocs.org/ntsb/CEN13LA502.md): Anderas Tiger Moth R80 · New Franken, WI · Accident · Minor injuries · Limited investigation · Final report · Aug 24, 2013 · N927TM · Substantial damage
  > The loss of engine power during initial climb for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN12LA530](https://openairdocs.org/ntsb/CEN12LA530.md): Williams John T-51 Mustang · Oshkosh, WI · Accident · Serious injuries · Limited investigation · Final report · Aug 7, 2012 · N151TA · Substantial damage
  > The separation of an engine cooling hose from the radiator.
- [NTSB CEN12CA469](https://openairdocs.org/ntsb/CEN12CA469.md): Purtee Kevin M Pietenpol Aircamper · Broadhead, WI · Accident · Serious injuries · Data collection · Final report · Jul 22, 2012 · N899KP · Substantial damage
  > The pilot's failure to adequately remove water-contaminated fuel during the preflight inspection, which resulted in a total loss of engine power during takeoff, and his decision to initiate a turn back to the runway with insufficient airspeed, which resulted…
- [NTSB CEN12CA409](https://openairdocs.org/ntsb/CEN12CA409.md): Wilkinson Lorin L Hatz XB-II · Oshkosh, WI · Accident · No injuries · Data collection · Final report · Jul 1, 2012 · N500L · Substantial damage
  > The pilot's loss of directional control while landing with a crosswind.
- [NTSB CEN10CA421](https://openairdocs.org/ntsb/CEN10CA421.md): Nord 3202 · Oshkosh, WI · Accident · No injuries · Data collection · Final report · Jul 19, 2010 · N2256Y · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll.
- [NTSB CEN09LA486](https://openairdocs.org/ntsb/CEN09LA486.md): Gallagher Junior ACE · Oshkosh, WI · Accident · No injuries · Limited investigation · Final report · Aug 2, 2009 · N413G · Substantial damage
  > The failure of a weld joint on the right rudder pedal leading to the loss of directional control during landing.
- [NTSB CHI07LA091](https://openairdocs.org/ntsb/CHI07LA091.md): Haddan Sonerai IIL · Fort Atkinson, WI · Accident · Serious injuries · Limited investigation · Final report · Mar 17, 2007 · N5200C · Substantial damage
  > The pilot's failure to maintain airspeed following a loss of engine power for undetermined reasons. A low altitude and an inadvertent stall were factors.
- [NTSB CHI05LA237](https://openairdocs.org/ntsb/CHI05LA237.md): Kircher RV-8 · Menomonie, WI · Accident · 1 fatal · Limited investigation · Final report · Aug 21, 2005 · N505DF · Destroyed
  > The pilot's decision to perform an aerobatic roll during takeoff, the low altitude, and his failure to maintain clearance from the crops and terrain.
- [NTSB CHI05CA032](https://openairdocs.org/ntsb/CHI05CA032.md): Olson Sonex · Oconomowoc, WI · Accident · Serious injuries · Data collection · Final report · Nov 21, 2004 · N478SX · Substantial damage
  > The loss of engine power due to a fatigue fracture of the crankshaft. An additional cause to the accident was the pilot/builder's failure to verify the dimensions of the shrink-fit crankshaft components prior reassembling the engine. A factor to the accident…
- [NTSB CHI04LA042](https://openairdocs.org/ntsb/CHI04LA042.md): Beech 99 · Mosinee, WI · Accident · No injuries · Limited investigation · Final report · Dec 16, 2003 · N399CZ · Substantial damage
  > The pilot's failure to maintain the proper descent rate and his inadequate flare.
- [NTSB CHI03LA162](https://openairdocs.org/ntsb/CHI03LA162.md): New Standard D-25 · West Bend, WI · Accident · No injuries · Limited investigation · Final report · Jun 13, 2003 · N930V · Substantial damage
  > The pilot's excessive braking during landing roll. Contributing factors to this accident were the pilot's lack of experience in the accident airplane.
- [NTSB CHI03LA012](https://openairdocs.org/ntsb/CHI03LA012.md): Mork Kitfox III · Evansville, WI · Accident · No injuries · Limited investigation · Final report · Oct 27, 2002 · N192MB · Substantial damage
  > The loss of power for undetermined reasons. A contributing factor is the unsuitable terrain.
- [NTSB CHI02CA267](https://openairdocs.org/ntsb/CHI02CA267.md): Tomash Avid Flyer · Camp Lake, WI · Accident · No injuries · Data collection · Final report · Aug 31, 2002 · N369AF · Substantial damage
  > The total failure of the engine ignition system, and the unsuitable terrain encountered during the forced landing. The low altitude was a contributing factor.
- [NTSB CHI02CA203](https://openairdocs.org/ntsb/CHI02CA203.md): Bilgri Sonerai II Lts · Juneau, WI · Accident · Minor injuries · Data collection · Final report · Jul 19, 2002 · N9B · Substantial damage
  > The pilot's failure to maintain sufficient airspeed while maneuvering to return to the airport. A reduction in handling quality and the distraction due to the open canopy were contributing factors.
- [NTSB CHI01LA313](https://openairdocs.org/ntsb/CHI01LA313.md): Gelasi Aircamper · Bloomfield, WI · Accident · Serious injuries · Limited investigation · Final report · Sep 3, 2001 · N7172B · Substantial damage
  > Aircraft control not possible due to the inadvertent control interference by the front seat passenger. Factors to the accident were the restricted control stick movement and the encountered stall.
- [NTSB CHI01LA171](https://openairdocs.org/ntsb/CHI01LA171.md): Larson Murphy Rebel · Stratford, WI · Accident · No injuries · Limited investigation · Final report · Jun 17, 2001 · N622GL · Substantial damage
  > The pilot's failure to abort the takeoff from the farm field. Factors were the tall grass, the rising terrain, the fence, and the inadequate planning/decision by the pilot.
- [NTSB CHI99FA263](https://openairdocs.org/ntsb/CHI99FA263.md): Underwood Brokaw Bullet · Oshkosh, WI · Accident · No injuries · Field investigation · Final report · Jul 29, 1999 · N331TB · Substantial damage
  > the pilot failed to maintain directional control of the airplane.
- [NTSB CHI99LA099](https://openairdocs.org/ntsb/CHI99LA099.md): Calkins Kitfox 5 · Waunakee, WI · Accident · No injuries · Limited investigation · Final report · Mar 1, 1999 · N394GL · Destroyed
  > the fracture of the trim actuator.
- [NTSB CHI96LA225](https://openairdocs.org/ntsb/CHI96LA225.md): Sisk BD-5 · Lake Geneva, WI · Accident · Serious injuries · Limited investigation · Final report · Jul 1, 1996 · N51SK · Destroyed
  > failure of the pilot to abort the takeoff, while there was sufficient runway remaining. The high temperature and calm wind were related factors.
- [NTSB CHI95LA141](https://openairdocs.org/ntsb/CHI95LA141.md): Sorrel SNS-4 · Menomonee Falls, WI · Accident · Minor injuries · Limited investigation · Final report · May 1, 1995 · N2026 · Substantial damage
  > the pilot's failure to maintain clearance with transmission wires. A factor in the accident was the transmission wires.
- [NTSB CHI94IA095](https://openairdocs.org/ntsb/CHI94IA095.md): British Aerospace ATP · Mosinee, WI · Incident · Minor injuries · Incident investigation · Final report · Feb 26, 1994 · N854AW · Minor damage
  > the inadequate design of the PBSI electrical switch(es), and the operator's failure to expeditiously implement corrective Service Bulletins.
- [NTSB CHI93LA295](https://openairdocs.org/ntsb/CHI93LA295.md): Gardner SEA RAY · Oshkosh, WI · Accident · Minor injuries · Limited investigation · Final report · Jul 31, 1993 · N703SR · Substantial damage
  > The pilot in command's not maintaining proper climb rate. A factor was the abrupt control interference by the passenger.
- [NTSB CHI91DEP10](https://openairdocs.org/ntsb/CHI91DEP10.md): Allan R. Goldman Dragonfly · Kenosha, WI · Accident · No injuries · Final report · Jun 16, 1991 · N222TH · Substantial damage
  > Inadequate aircraft design and insufficient information regarding wing versus canard angle for an amateur built aircraft.
- [NTSB CHI91DEP06](https://openairdocs.org/ntsb/CHI91DEP06.md): Avid Flyer Avid Flyer · Endeavor, WI · Accident · No injuries · Final report · Jun 7, 1991 · N369AF · Substantial damage
  > The pilot in command's inability to effectively eliminate carburetor ice to avoid an emergency landing.
- [NTSB CHI90LA274](https://openairdocs.org/ntsb/CHI90LA274.md): Burkhart Grob 109A · Waukesha, WI · Accident · Minor injuries · Limited investigation · Final report · Sep 26, 1990 · N912G · Substantial damage
  > The pilot's failure to maintain adequate clearance and visual lookout for the moving tractor.
- [NTSB CHI88FA178](https://openairdocs.org/ntsb/CHI88FA178.md): Sonerai IIL · Oshkosh, WI · Accident · No injuries · Field investigation · Final report · Jul 28, 1988 · N398 · Substantial damage
- [NTSB CHI82DA201](https://openairdocs.org/ntsb/CHI82DA201.md): Cessna 140 · Stevens Point, WI · Accident · No injuries · Final report · Jun 6, 1982 · N3103N · Substantial damage
  > During arrival, the pilot entered traffic for runway 21. The wind was from 180 degrees at 15 gusting to 35 KTS. The pilot stated that while on final approach, he slipped the plane to the right to land on the grass, but went beyond the smooth grass. After…
- [NTSB CHI77FA062](https://openairdocs.org/ntsb/CHI77FA062.md): Bellanca 7ACA · Oshkosh, WI · Accident · 1 fatal · Closed · Aug 1, 1977 · N12204 · 2 aircraft · Destroyed
- [NTSB CHI75FEP12](https://openairdocs.org/ntsb/CHI75FEP12.md): Walts Wings S1 · Hartford, WI · Accident · Minor injuries · Closed · Aug 5, 1974 · N7748 · Substantial damage
- [NTSB CHI74DEP47](https://openairdocs.org/ntsb/CHI74DEP47.md): Steffens C-II · Columbus, WI · Accident · No injuries · Closed · May 26, 1974 · N8981 · 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 ('99999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=99999&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.