# NTSB investigations: Amateur-built UNKNOWN ENG, MN

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 CEN25LA258](https://openairdocs.org/ntsb/CEN25LA258.md): Zenith Stol CH701 · Blaine, MN · Accident · No injuries · Class 4 · Limited · Final report · Jul 17, 2025 · N237FC · Substantial damage
  > The pilot’s failure to maintain directional control while landing with a crosswind.
- [NTSB CEN23LA109](https://openairdocs.org/ntsb/CEN23LA109.md): Cessna 150 · Montevideo, MN · Accident · No injuries · Class 4 · Limited · Final report · Feb 4, 2023 · N1982Z · Substantial damage
  > The pilot’s failure to maintain directional control during the landing roll.
- [NTSB CEN22LA191](https://openairdocs.org/ntsb/CEN22LA191.md): Vans RV6A · Mankato, MN · Accident · Serious injuries · Class 3 · Limited · Final report · May 4, 2022 · N5060 · Substantial damage
  > The pilot’s failure to maintain directional control while landing with a higher airspeed.
- [NTSB CEN18LA237](https://openairdocs.org/ntsb/CEN18LA237.md): Zenith Stol CH701 · Maple Lake, MN · Accident · No injuries · Limited investigation · Final report · Jun 22, 2018 · N736MM · Substantial damage
  > The total loss of engine power for reasons that could not be determined based on the available evidence.
- [NTSB CEN17LA117](https://openairdocs.org/ntsb/CEN17LA117.md): Jude Mike C Side Winder · Paynesville, MN · Accident · Serious injuries · Limited investigation · Final report · Mar 4, 2017 · N7524V · Substantial damage
  > The pilot’s inadequate preflight inspection, during which he failed to ensure that there was sufficient coolant in the engine reservoir, which resulted in the engine getting too hot and the engine control module shutting down the engine.
- [NTSB CEN14LA244](https://openairdocs.org/ntsb/CEN14LA244.md): Crawford Preceptor Ultra PUP · Mabel, MN · Accident · Minor injuries · Limited investigation · Final report · May 17, 2014 · N1171Q · Substantial damage
  > The loss of engine power as a result of carburetor icing.
- [NTSB CEN14CA156](https://openairdocs.org/ntsb/CEN14CA156.md): Olson Kenneth H T Zodiac 601 HDS · Garrison, MN · Accident · No injuries · Data collection · Final report · Mar 8, 2014 · N981HT · Substantial damage
  > The pilot's failure to maintain directional control during takeoff which resulted in the airplane striking a snow bank.
- [NTSB CEN13LA418](https://openairdocs.org/ntsb/CEN13LA418.md): Marino Benoist Type XIV · Duluth, MN · Accident · No injuries · Limited investigation · Final report · Jul 16, 2013 · N613LD · Substantial damage
  > The pilot's failure to maintain control of the seaplane during its initial flight test. Contributing to the accident was the pilot's overall lack of flight experience in the seaplane.
- [NTSB CEN12CA588](https://openairdocs.org/ntsb/CEN12CA588.md): Trick Trikes Stss · Wanamingo, MN · Accident · Minor injuries · Data collection · Final report · Aug 26, 2012 · N5152E · Substantial damage
  > The pilot's failure to maintain adequate airspeed while maneuvering at low altitude, which resulted in an aerodynamic stall.
- [NTSB CEN12CA597](https://openairdocs.org/ntsb/CEN12CA597.md): Bordelon Bruce Kitfox IV · Castlerock, MN · Accident · No injuries · Data collection · Final report · Jul 31, 2012 · N396BK · Destroyed
  > Propeller system failure during a go-around maneuver resulting in a forced landing. Contributing to the severity of damage to the airplane was the postimpact fire.
- [NTSB CEN12LA452](https://openairdocs.org/ntsb/CEN12LA452.md): Mikoyan Gurevich MIG 21MF · Minneapolis, MN · Accident · Minor injuries · Limited investigation · Final report · Jul 12, 2012 · N9307 · Substantial damage
  > The pilot's delayed application of wheel brakes to slow the airplane down on landing and the airplane’s failed drag chute, which resulted in a runway overrun.
- [NTSB CEN11LA499](https://openairdocs.org/ntsb/CEN11LA499.md): Air Tractor AT-502 · Fergus Falls, MN · Accident · No injuries · Limited investigation · Final report · Jul 22, 2011 · N1516G · Substantial damage
  > The total loss of engine power for reasons that could not be determined because the airplane came to rest inverted in water.
- [NTSB CEN10CA304](https://openairdocs.org/ntsb/CEN10CA304.md): Bordelon Kitfox IV · Stanton, MN · Accident · No injuries · Data collection · Final report · Jun 7, 2010 · N396BK · Substantial damage
  > The pilot’s inadvertent propeller blade pitch change and subsequent loss of forward thrust.
- [NTSB CEN09CA592](https://openairdocs.org/ntsb/CEN09CA592.md): Bordelon Kitfox IV · Dodge Center, MN · Accident · No injuries · Data collection · Final report · Sep 18, 2009 · N396BK · Substantial damage
  > The pilot's improper glide path during landing.
- [NTSB CHI08LA154](https://openairdocs.org/ntsb/CHI08LA154.md): Beech A36 · Grand Rapids, MN · Accident · No injuries · Limited investigation · Final report · Jun 9, 2008 · N7214Y · Substantial damage
  > A loss of engine thrust due to the propeller separating from the aircraft as a result of fatigue failure of the propeller attachment bolts caused by the insufficient torque of the bolts during installation.
- [NTSB CHI07LA272](https://openairdocs.org/ntsb/CHI07LA272.md): Clifford Titan Tornado II · Henning, MN · Accident · 1 fatal · Limited investigation · Final report · Aug 17, 2007 · N39YP · Substantial damage
  > The inadvertent stall and low airspeed while maneuvering. A contributing factor was the low altitude of the maneuver.
- [NTSB CHI06CA233](https://openairdocs.org/ntsb/CHI06CA233.md): Hoyt Kolb Mark III Clsc · Lakeville, MN · Accident · No injuries · Data collection · Final report · Aug 15, 2006 · N232S · Substantial damage
  > The pilot's failure to maintain clearance from the crops which resulted in the subsequent impact with the ground.
- [NTSB CHI05CA005](https://openairdocs.org/ntsb/CHI05CA005.md): Buss Rotorway Exec · Eden Prairie, MN · Accident · No injuries · Data collection · Final report · Oct 9, 2004 · N82DR · Substantial damage
  > The pilot's inadvertent deactivation of the battery switch leading to the helicopter's loss of engine power on base leg. A factor was the crops he encountered during the emergency landing.
- [NTSB CHI04CA190](https://openairdocs.org/ntsb/CHI04CA190.md): Selby Dean KR-2-SS · Lake Elmo, MN · Accident · No injuries · Data collection · Final report · Jul 15, 2004 · N299DS · Substantial damage
  > The pilot's inadequate compensation for wind conditions and his failure to maintain aircraft control. A related factor was the crosswind.
- [NTSB CHI03LA214](https://openairdocs.org/ntsb/CHI03LA214.md): Ayres S2R-G10 · Staples, MN · Accident · No injuries · Limited investigation · Final report · Jul 17, 2003 · N3299A · Destroyed
  > The fatigue fracture of the oil jet flange resulting in a total engine failure during the aerial application.
- [NTSB CHI02LA165](https://openairdocs.org/ntsb/CHI02LA165.md): Firm Kit Fox 4-1200 · Virginia, MN · Accident · No injuries · Limited investigation · Final report · Jun 15, 2002 · N598HL · Destroyed
  > An in-flight collision with a bird that resulted in severed fuel lines and the subsequent in-flight fire and loss of engine power. A factor in the accident was the soft terrain condition.
- [NTSB CHI90DER04](https://openairdocs.org/ntsb/CHI90DER04.md): BD 4- Francisco BD-4 · Rosemount, MN · Accident · Minor injuries · Final report · Jul 31, 1990 · N853BF · Substantial damage
  > Failure of the manufacturer (amateur built) to design fuel system adequately to prevent vapor lock in fuel line.
- [NTSB CHI86IA115](https://openairdocs.org/ntsb/CHI86IA115.md): Boeing 757-251 · Minneapolis, MN · Incident · No injuries · Incident investigation · Final report · Apr 3, 1986 · N508US · Minor damage
  > N508US was operating as nwa flt 150. The captain stated after the incident that the flt was uneventful until landing. Upon landing and spoiler deployment, the acft pitched up abruptly, to an attitude of 10 degrees. The landing was completed without incident.…
- [NTSB CHI86FER02](https://openairdocs.org/ntsb/CHI86FER02.md): Monnett Moni · Winona, MN · Accident · Minor injuries · Final report · Mar 29, 1986 · N295MM · Substantial damage
  > The acft crash landed off the arpt due to a reported loss of power. The plt landed in a small field surrounded by hills. The acft sink rate during the landing was high and the acft was damaged. Inspection of the eng after the acc was not accomplished due to…
- [NTSB CHI84LA272](https://openairdocs.org/ntsb/CHI84LA272.md): Howard E. Lee Rutan Long EZ · Minneapolis, MN · Accident · Minor injuries · Limited investigation · Final report · Jun 30, 1984 · N373JH · Substantial damage
  > The plt claimed a loss of power during takeoff. He turned and attempted a landing on the arpt. The rwy was overrun and the acft stopped in a wheat field. Post accident examination of the engine revealed no discrepancies.
- [NTSB CHI84LA245](https://openairdocs.org/ntsb/CHI84LA245.md): Bell 47-G2 · Nimrod, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 18, 1984 · N18JM · Destroyed
  > While landing in an area of tall grass a skid collided with a sand ridge causing a roll over.
- [NTSB CHI83LA197](https://openairdocs.org/ntsb/CHI83LA197.md): Holmes XTC2 · River Falls, MN · Accident · Serious injuries · Limited investigation · Final report · May 4, 1983 · N3885D · Substantial damage
  > The acft pulled up steeply after takeoff and stalled. The acft crashed back on the rwy. The pilot said he reduced power after takeoff and the acft stalled. He also said if he had not reduced power the accident would not have happened.
- [NTSB CHI80DER43](https://openairdocs.org/ntsb/CHI80DER43.md): Hughes 269C · Willmar, MN · Accident · No injuries · Closed · Jun 1, 1980 · N7448F · Substantial damage
- [NTSB MKC79DER74](https://openairdocs.org/ntsb/MKC79DER74.md): Pietenpol Aircmp · Minneapolis, MN · Accident · Minor injuries · Closed · Sep 21, 1979 · N25157 · Substantial damage
- [NTSB MKC79FER63](https://openairdocs.org/ntsb/MKC79FER63.md): Hughes 269C · Willmar, MN · Accident · No injuries · Closed · Jul 2, 1979 · N7448F · Substantial damage
- [NTSB MKC77DER74](https://openairdocs.org/ntsb/MKC77DER74.md): Pietenpol-A Scout · Mankato, MN · Accident · No injuries · Closed · Aug 6, 1977 · N5987 · Substantial damage
- [NTSB MKC67F0190](https://openairdocs.org/ntsb/MKC67F0190.md): Vollmer VJ-22 · Waubun, MN · Accident · No injuries · Closed · Jul 10, 1966 · N4634T · 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" = 'MN' 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=MN

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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.