# NTSB investigations, MN: Not determined, general

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 CEN25LA083](https://openairdocs.org/ntsb/CEN25LA083.md): Raytheon Hawker 800XP · Minneapolis, MN · Accident · No injuries · Class 4 · Limited · Final report · Jan 20, 2025 · N6NR · Substantial damage
  > The failure of the nose landing gear to extend for undetermined reasons.
- [NTSB CEN25LA041](https://openairdocs.org/ntsb/CEN25LA041.md): Rotorway Exec 162 F · Blaine, MN · Accident · No injuries · Class 4 · Limited · Final report · Nov 15, 2024 · N280P · Substantial damage
  > A loss of engine power that resulted in a hard landing.
- [NTSB CEN23LA376](https://openairdocs.org/ntsb/CEN23LA376.md): Sixchuter Spirit XL · Hovland, MN · Accident · 1 fatal · Class 4 · Limited · Final report · Aug 18, 2023 · N538DR · Destroyed
  > The collision with the lake by a noncertificated pilot for reasons that could not be determined.
- [NTSB CEN23FA269](https://openairdocs.org/ntsb/CEN23FA269.md): Schweizer G-164B · Beltrami, MN · Accident · 1 fatal · Class 3 · Field · Final report · Jun 27, 2023 · N7503H · Substantial damage
  > A collision with terrain and subsequent nose over for undetermined reasons.
- [NTSB ERA23FA130](https://openairdocs.org/ntsb/ERA23FA130.md): Cirrus Design SR22 · Duluth, MN · Accident · 1 fatal · Class 3 · Field · Final report · Feb 24, 2023 · N929DR · Destroyed
  > A rapid descent and subsequent collision with terrain for reasons that could not be determined based on the available evidence.
- [NTSB CEN21LA244](https://openairdocs.org/ntsb/CEN21LA244.md): Dehavilland DHC-2 MK.I · Oak Island, MN · Accident · Serious injuries · Class 3 · Limited · Final report · May 22, 2021 · N218RD · Minor damage
  > The failure of an O-ring in the landing gear system, which resulted in the inadvertent extension of the main wheel in the amphibious float. Contributing to the accident was the pilot’s decision to depart with a known hydraulic leak in the landing gear system.
- [NTSB CEN20LA392](https://openairdocs.org/ntsb/CEN20LA392.md): Cessna 172 · Cottage Grove, MN · Accident · 3 fatal · Class 3 · Limited · Final report · Sep 13, 2020 · N8488L · Destroyed
  > A steep descent and impact with terrain for reasons that could not be determined based on the available information.
- [NTSB CEN19LA281](https://openairdocs.org/ntsb/CEN19LA281.md): Stinson 108 · Grand Rapids, MN · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 21, 2019 · N647C · Substantial damage
  > A loss of engine power after takeoff for undetermined reasons.
- [NTSB CEN19FA218](https://openairdocs.org/ntsb/CEN19FA218.md): GIbb AR-1 · Hawley, MN · Accident · 1 fatal · Field investigation · Final report · Jul 11, 2019 · N14968 · Destroyed
  > An in-flight loss of control and collision with terrain for reasons that could not be determined based on the available information.
- [NTSB CEN18LA349](https://openairdocs.org/ntsb/CEN18LA349.md): North American T-28B · Minneapolis, MN · Accident · Serious injuries · Limited investigation · Final report · Aug 23, 2018 · N215SF · Destroyed
  > The fire during approach for reasons that could not be determined based on the available evidence, which resulted in impact with terrain during approach for a precautionary landing.
- [NTSB CEN18LA332](https://openairdocs.org/ntsb/CEN18LA332.md): Aero Commander S2R · Westbrook, MN · Accident · Minor injuries · Limited investigation · Final report · Aug 15, 2018 · N5521X · Substantial damage
  > A runway excursion during takeoff for reasons that could not be determined based on the available evidence.
- [NTSB CEN18LA311](https://openairdocs.org/ntsb/CEN18LA311.md): Cessna 188 · Watkins, MN · Accident · No injuries · Limited investigation · Final report · Aug 2, 2018 · N5523S · Substantial damage
  > A partial loss of engine power for reasons that could not be determined because a postaccident examination revealed no evidence of preimpact mechanical malfunctions or failures that would have precluded normal operation.
- [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 CEN18FA083](https://openairdocs.org/ntsb/CEN18FA083.md): Skwira Matthew J W-10 Tailwind · Sauk Centre, MN · Accident · 1 fatal · Field investigation · Final report · Jan 23, 2018 · N251WT · Substantial damage
  > Impact with terrain for reasons that could not be determined based on the available information.
- [NTSB CEN18FA003](https://openairdocs.org/ntsb/CEN18FA003.md): Schaffer Fisher Horizon 2 · Eden Prairie, MN · Accident · 1 fatal · Field investigation · Final report · Oct 4, 2017 · N428AP · Destroyed
  > An inflight loss of control and collision with terrain for undetermined reasons after a thorough examination of the airplane's flight controls was unable to confirm control continuity. Contributing to the accident was the pilot's lack of experience in the…
- [NTSB CEN17LA250](https://openairdocs.org/ntsb/CEN17LA250.md): North American T-28A · Moorhead, MN · Accident · 1 fatal · Limited investigation · Final report · Jul 2, 2017 · N9103F · Destroyed
  > Controlled descent into terrain due to engine issues, the reason for which could not be determined because examination of the engine revealed no evidence of malfunctions or failures that would have precluded normal operation.
- [NTSB CEN17LA238](https://openairdocs.org/ntsb/CEN17LA238.md): Aeronca 7BCM · Mahnomen, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 21, 2017 · N2558E · Substantial damage
  > The pilot’s failure to abort the takeoff after recognizing a partial loss of engine power during the takeoff roll and his subsequent inability to maintain adequate airspeed during a turn to avoid power lines, which resulted in an aerodynamic stall. The…
- [NTSB CEN17LA232](https://openairdocs.org/ntsb/CEN17LA232.md): Bell-Tellijohn 47G · Hastings, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 15, 2017 · N90529 · Substantial damage
  > The pilot's failure to maintain helicopter control for reasons that could not be determined because postaccident examination of the helicopter did not reveal any preimpact mechanical malfunctions or anomalies that would have precluded normal operation.
- [NTSB CEN17LA148](https://openairdocs.org/ntsb/CEN17LA148.md): Cessna T210M · Detroit Lakes, MN · Accident · No injuries · Limited investigation · Final report · Apr 5, 2017 · N1215M · Substantial damage
  > The malfunction of the right main landing gear actuator for reasons that could not be determined because postaccident examination revealed no mechanical anomalies that would have precluded normal operation. Contributing to the accident was the improper…
- [NTSB CEN16LA391](https://openairdocs.org/ntsb/CEN16LA391.md): Cessna 177RG · Cloquet, MN · Accident · No injuries · Limited investigation · Final report · Sep 30, 2016 · N1528H · Substantial damage
  > A lack of lubrication in the engine for reasons that could not be determined based on the available information, which resulted in a failure of the No. 4 connecting rod and a subsequent total loss of engine power.
- [NTSB CEN16LA156](https://openairdocs.org/ntsb/CEN16LA156.md): Bell 206 · Arden Hills, MN · Accident · Minor injuries · Class 3 · Limited · Final report · Apr 18, 2016 · N119SP · Substantial damage
  > A partial loss of engine power for reasons that could not be determined based on the available evidence
- [NTSB CEN15LA326](https://openairdocs.org/ntsb/CEN15LA326.md): Eagle Eagle DW 1 · Hector, MN · Accident · No injuries · Limited investigation · Final report · Jul 29, 2015 · N8806B · Substantial damage
  > The intermittent partial loss of engine power, which resulted in a lower-than-expected approach glidepath and impact with terrain short of the runway. The reason for the intermittent partial loss of engine power could not be determined because postaccident…
- [NTSB CEN15LA309](https://openairdocs.org/ntsb/CEN15LA309.md): Cessna 172RG · Anoka, MN · Accident · No injuries · Limited investigation · Final report · Jul 17, 2015 · N6511V · Substantial damage
  > Failure of the left landing gear actuator for reasons that could not be determined because the actuator was not made available for examination.
- [NTSB CEN14FA306](https://openairdocs.org/ntsb/CEN14FA306.md): Brumwell RV-6 · Sauk Rapids, MN · Accident · 2 fatal · Field investigation · Final report · Jun 21, 2014 · N135BB · Destroyed
  > The pilot’s loss of pitch control due to the in-flight opening of the canopy during cruise flight for reasons that could not be determined because fire damage precluded examination of the airplane’s canopy and systems.
- [NTSB CEN14LA320](https://openairdocs.org/ntsb/CEN14LA320.md): Cessna 172XP · St. Cloud, MN · Accident · No injuries · Limited investigation · Final report · Jun 20, 2014 · N758HP · Substantial damage
  > The pilot's failure to maintain the proper airspeed and angle-of-attack after a partial loss of engine power on takeoff, which resulted in a stall and the subsequent impact with water. Contributing to the accident was the partial loss of engine power due to…
- [NTSB CEN14FA034](https://openairdocs.org/ntsb/CEN14FA034.md): Piper PA 23-250 · Caledonia, MN · Accident · 3 fatal · Field investigation · Final report · Nov 1, 2013 · N6068Y · Substantial damage
  > The pilot's loss of control for reasons that could not be determined because the postaccident airplane examination did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN13LA376](https://openairdocs.org/ntsb/CEN13LA376.md): Avery Jack H Glastar GS-1 · Grand Rapids, MN · Accident · Serious injuries · Limited investigation · Final report · Jun 25, 2013 · N103A · Substantial damage
  > The loss of directional control during landing because the autopilot engaged for undetermined reasons because water and recovery damage precluded detailed examination of system components.
- [NTSB CEN13LA363](https://openairdocs.org/ntsb/CEN13LA363.md): Thomsen Avid Flyer MK IV · Hibbing, MN · Accident · No injuries · Limited investigation · Final report · Jun 20, 2013 · N6240T · Substantial damage
  > A total loss of engine power for reasons that could not be determined because the postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
- [NTSB CEN13FA357](https://openairdocs.org/ntsb/CEN13FA357.md): Bell 47G-3B-1 · Maplewood, MN · Accident · 1 fatal · Field investigation · Final report · Jun 19, 2013 · N5024N · Destroyed
  > The loss of helicopter control for reasons that could not be determined because an examination of the helicopter and its systems revealed no malfunctions or failures that would have precluded normal operation.
- [NTSB CEN13FA101](https://openairdocs.org/ntsb/CEN13FA101.md): Cessna 501 · Detroit Lakes, MN · Accident · No injuries · Field investigation · Final report · Dec 8, 2012 · N212M · Substantial damage
  > A loss of airplane control due to an undetermined avionics malfunction and the pilots’ inattention, which resulted in excessive airframe forces during the unusual attitude recovery. The reason for the avionics malfunction could not be determined because…
- [NTSB CEN12LA492](https://openairdocs.org/ntsb/CEN12LA492.md): Maule M-4 · Springfield, MN · Accident · No injuries · Limited investigation · Final report · Jul 10, 2012 · N12026 · Substantial damage
  > The tailwheel spring's overload failure during landing, resulting in a ground loop and runway excursion.
- [NTSB CEN12FAMS1](https://openairdocs.org/ntsb/CEN12FAMS1.md): Piper PA-31-325 · Duluth, MN · Accident · 1 fatal · Missing aircraft · Final report · Jun 8, 2012 · N174BH · Substantial damage
  > Undetermined because the airplane was not found.
- [NTSB CEN12LA244](https://openairdocs.org/ntsb/CEN12LA244.md): T Bird Golden Circle Air II · Clara City, MN · Accident · Serious injuries · Limited investigation · Final report · Apr 14, 2012 · N5654N · Substantial damage
  > The airplane's loss of engine power for reasons that could not be determined because postaccident examination did not reveal any malfunctions or anomalies that would have precluded normal operation.
- [NTSB CEN12FA091](https://openairdocs.org/ntsb/CEN12FA091.md): Robinson Helicopter R44 II · Hackensack, MN · Accident · 1 fatal · Field investigation · Final report · Nov 25, 2011 · N821JV · Substantial damage
  > The helicopter's sudden yaw and subsequent impact with the water for reasons that could not be determined during postaccident examination of the helicopter and its systems.
- [NTSB CEN11CA637](https://openairdocs.org/ntsb/CEN11CA637.md): Aero Commander S2R · Park Rapids, MN · Accident · No injuries · Data collection · Final report · Sep 1, 2011 · N8962Q · Substantial damage
  > The loss of engine power for undetermined reasons.
- [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 CEN11CA017](https://openairdocs.org/ntsb/CEN11CA017.md): Luscombe 8D · Clarrisa, MN · Accident · Serious injuries · Data collection · Final report · Oct 11, 2010 · N72060 · Substantial damage
  > The partial loss of engine power for undetermined reasons.
- [NTSB CEN10LA431](https://openairdocs.org/ntsb/CEN10LA431.md): Bell 47G-4A · Rochester, MN · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2010 · N124SH · Substantial damage
  > The total loss of engine power due to a high-cycle fatigue fracture of a first-stage compressor blade. The reason for the fracture could not be determined during postaccident examination.
- [NTSB CEN10FA322](https://openairdocs.org/ntsb/CEN10FA322.md): Piper PA-23 · Rochester, MN · Accident · 3 fatal · Field investigation · Final report · Jun 17, 2010 · N7SE · Substantial damage
  > The loss of engine power and the pilot's subsequent loss of control for undetermined reasons.
- [NTSB CEN10LA064](https://openairdocs.org/ntsb/CEN10LA064.md): Krusmark David Homer Searey · St. Paul, MN · Accident · Serious injuries · Limited investigation · Final report · Nov 28, 2009 · N4031 · Minor damage
  > The pilot's delay in aborting the takeoff during the takeoff roll when he became aware of the engine not producing full power.
- [NTSB CEN09LA561](https://openairdocs.org/ntsb/CEN09LA561.md): Champion 7KCAB · Stacy, MN · Accident · Serious injuries · Limited investigation · Final report · Sep 4, 2009 · N2629G · Substantial damage
  > A partial loss of engine power during initial climb for undetermined reasons.
- [NTSB CEN09CA322](https://openairdocs.org/ntsb/CEN09CA322.md): Stinson 10A · Pickwick, MN · Accident · No injuries · Data collection · Final report · May 17, 2009 · N31584 · Substantial damage
  > The loss of engine power for undetermined reasons.
- [NTSB CHI08LA219](https://openairdocs.org/ntsb/CHI08LA219.md): Kolb Mark II · Chisholm, MN · Accident · Serious injuries · Limited investigation · Final report · Jul 29, 2008 · UNREG · Substantial damage
  > The loss of engine power during initial climb for undetermined reasons.
- [NTSB CHI08LA180](https://openairdocs.org/ntsb/CHI08LA180.md): Smith Aerostar 601P · Alexandria, MN · Accident · Minor injuries · Limited investigation · Final report · Jul 2, 2008 · N601TS · Substantial damage
  > The loss of engine power for undetermined reasons. Contributing to the accident was the unsuitable terrain for the forced landing.
- [NTSB CHI08LA067](https://openairdocs.org/ntsb/CHI08LA067.md): Ziermann RV8 · Garrison, MN · Accident · Serious injuries · Limited investigation · Final report · Jan 12, 2008 · N617MZ · Substantial damage
  > The loss of engine power for undetermined reasons during cruise and the misjudged flare resulting in a hard landing. Contributing to the accident was the frozen lake to which the pilot performed a forced landing.

## 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 f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '05000000'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-findings/05000000/cases?state=MN

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