# Final NTSB investigations: Franklin 6A4165 series

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.

Page 1 of 9 · 436 cases

## Latest cases

- [NTSB ERA26LA108](https://openairdocs.org/ntsb/ERA26LA108.md): Stinson 108-3 · Palmetto, FL · Accident · No injuries · Class 4 · Limited · Final report · Feb 6, 2026 · N528C · Substantial damage
  > The pilot's inadequate preflight fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.
- [NTSB ANC25LA058](https://openairdocs.org/ntsb/ANC25LA058.md): Stinson 108-8 · Alexander Creek, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 25, 2025 · N97438 · Substantial damage
  > The pilot’s failure to maintain airplane control during final approach. Contributing to the accident was the airplane’s encounter with a downdraft that led to a rapid loss of altitude.
- [NTSB WPR25LA179](https://openairdocs.org/ntsb/WPR25LA179.md): Stinson 108-2 · East Wenatchee, WA · Accident · No injuries · Class 4 · Limited · Final report · Jun 13, 2025 · N9550K · Substantial damage
  > The pilot’s failure to maintain directional control during the landing roll with a left crosswind.
- [NTSB ANC25LA036](https://openairdocs.org/ntsb/ANC25LA036.md): Stinson 108 · North Pole, AK · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 25, 2025 · N9308K · Substantial damage
  > The pilot's failure to maintain obstacle clearance which resulted in an in-flight collision with a tree. Contributing to the accident was his impairment from the effects of alcohol consumption.
- [NTSB ANC24LA048](https://openairdocs.org/ntsb/ANC24LA048.md): Stinson 108-2 · Bethel, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 1, 2024 · N299C · Substantial damage
  > The uncertificated pilot’s decision to fly an unairworthy airplane and his failure to maintain directional control during landing, which resulted in a landing gear collapse. Contributing was the failure of the right main landing gear oleo strut.
- [NTSB ERA24LA210](https://openairdocs.org/ntsb/ERA24LA210.md): Stinson 108-2 · Titusville, FL · Accident · No injuries · Class 4 · Limited · Final report · May 6, 2024 · N2721L · Substantial damage
  > The pilot’s failure to maintain directional control while landing in variable wind conditions, which resulted in runway excursion and collision with an approach light.
- [NTSB ERA24LA052](https://openairdocs.org/ntsb/ERA24LA052.md): Stinson 108-2 · Martinsville, VA · Accident · No injuries · Class 4 · Limited · Final report · Nov 30, 2023 · N9564K · Substantial damage
  > The pilot’s failure to maintain directional control during a wheel landing in crosswind conditions and the flight instructor’s delayed remedial action, which resulted in a ground loop on the runway.
- [NTSB WPR23LA117](https://openairdocs.org/ntsb/WPR23LA117.md): Stinson 108 · Lampasas, TX · Accident · No injuries · Class 3 · Limited · Final report · Mar 4, 2023 · N6532M · Substantial damage
  > Improper case hardening of the crankshaft timing gear, which resulted in the fatigue failure of the gear and a total loss of engine power.
- [NTSB ERA22LA333](https://openairdocs.org/ntsb/ERA22LA333.md): Stinson 108 · Batesburg, SC · Accident · No injuries · Class 3 · Limited · Final report · Jul 23, 2022 · N6020M · Substantial damage
  > The fatigue failure of the crankshaft gear, resulting in a total loss of engine power.
- [NTSB WPR22LA085](https://openairdocs.org/ntsb/WPR22LA085.md): Universal Stinson 108-2 · Byron, CA · Accident · No injuries · Class 4 · Limited · Final report · Jan 27, 2022 · N9433K · Substantial damage
  > The pilot’s inadequate flare and loss of directional control during landing which resulted in a runway excursion. Contributing to the accident was the instructor’s delayed remedial action.
- [NTSB ANC21LA086](https://openairdocs.org/ntsb/ANC21LA086.md): Stinson 108-3 · Port Alsworth, AK · Accident · No injuries · Class 3 · Limited · Final report · Sep 12, 2021 · N6476M · Substantial damage
  > A loss of directional control for reasons that could not be determined based on the available information.
- [NTSB WPR21LA251](https://openairdocs.org/ntsb/WPR21LA251.md): Stinson 108-3 · Stevenson, WA · Accident · Serious injuries · Class 4 · Limited · Final report · Jun 27, 2021 · N6548M · Destroyed
  > A runway incursion, which resulted in a go-around, and subsequent forced landing when the airplane was not able to climb at a rate sufficient to clear approaching rising terrain.
- [NTSB WPR21LA064](https://openairdocs.org/ntsb/WPR21LA064.md): Stinson 108-3 · El Monte, CA · Accident · No injuries · Class 3 · Limited · Final report · Nov 3, 2020 · N6855M · Substantial damage
  > A loss of directional control during the landing roll due to an undetermined failure of the tailwheel assembly.
- [NTSB ERA20LA320](https://openairdocs.org/ntsb/ERA20LA320.md): Stinson 108 · Newport, PA · Accident · Minor injuries · Class 3 · Limited · Final report · Sep 17, 2020 · N336C · Substantial damage
  > A total loss of engine power during cruise flight due to a disconnected carburetor mixture control cable which allowed the carburetor mixture lever to migrate to the cut-off position during flight.
- [NTSB CEN20LA377](https://openairdocs.org/ntsb/CEN20LA377.md): Stinson 108-3 · Coleman, MI · Accident · No injuries · Class 3 · Limited · Final report · Sep 1, 2020 · N909C · Substantial damage
  > The pilot’s improper installation of the generator drive gear, which resulted in a total loss of engine power.
- [NTSB CEN20LA345](https://openairdocs.org/ntsb/CEN20LA345.md): Stinson 108 · Glenwood Springs, CO · Accident · No injuries · Class 3 · Limited · Final report · Aug 12, 2020 · N9726K · Substantial damage
  > The pilot’s loss of directional control upon landing due to a sheared tailwheel locking pin.
- [NTSB WPR20CA236](https://openairdocs.org/ntsb/WPR20CA236.md): Stinson 108 · Farewell Lakes, AK · Accident · No injuries · Class 4 · Data collection · Final report · Jul 8, 2020 · N134C · Substantial damage
  > The pilot's delayed decision to abort the takeoff roll, which resulted in a runway overrun and airplane nose over.
- [NTSB ANC20CA063](https://openairdocs.org/ntsb/ANC20CA063.md): Stinson 108 · Nikolai, AK · Accident · No injuries · Class 4 · Data collection · Final report · Jul 2, 2020 · N6252M · Substantial damage
  > The pilot's improper decision to depart from an unsuitable off-airport surface which resulted in a departure area excursion and impact with trees.
- [NTSB CEN20CA204](https://openairdocs.org/ntsb/CEN20CA204.md): Stinson 108 · Denver, CO · Accident · No injuries · Class 4 · Data collection · Final report · Jun 1, 2020 · N6518M · Substantial damage
  > The pilot’s failure to maintain directional control while landing during variable wind conditions.
- [NTSB ANC19TA055](https://openairdocs.org/ntsb/ANC19TA055.md): Stinson 108 · Tyonek, AK · Accident · Serious injuries · Class 4 · Final report · Sep 26, 2019 · N6533M · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack during a short field takeoff, which resulted in an aerodynamic stall and loss of control.
- [NTSB CEN19LA222](https://openairdocs.org/ntsb/CEN19LA222.md): Stinson 108 · Clinton, AR · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 13, 2019 · N9651K · Substantial damage
  > A partial loss of engine power for undetermined reasons.
- [NTSB WPR19LA207](https://openairdocs.org/ntsb/WPR19LA207.md): Stinson 108 · Klamath Falls, OR · Accident · No injuries · Class 3 · Limited · Final report · Jul 9, 2019 · N6642M · Substantial damage
  > The mechanic’s failure to identify an engine performance issue, which led to a partial loss of engine power. Contributing to the accident was the pilot’s decision to operate the airplane with a known mechanical deficiency.
- [NTSB WPR19LA179](https://openairdocs.org/ntsb/WPR19LA179.md): Stinson 108 · Caldwell, ID · Accident · Minor injuries · Class 3 · Limited · Final report · Jun 27, 2019 · N6116M · Substantial damage
  > A total loss of engine power during approach due to a failed piston. The reason for the piston failure could not be determined based on the available information.
- [NTSB GAA19CA263](https://openairdocs.org/ntsb/GAA19CA263.md): Stinson 108 · Soldotna, AK · Accident · No injuries · Data collection · Final report · May 12, 2019 · N6392M · Substantial damage
  > The pilot's overapplication of the brakes during landing on a soft runway, which resulted in a nose-over.
- [NTSB ERA18LA242](https://openairdocs.org/ntsb/ERA18LA242.md): Stinson 108 · Indiana, PA · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 2, 2018 · N4059C · Substantial damage
  > A total loss of engine power as a result of debris contamination of the fuel, which resulted in fuel starvation.
- [NTSB GAA18CA237](https://openairdocs.org/ntsb/GAA18CA237.md): Stinson 108 · Eliza Island, WA · Accident · Minor injuries · Data collection · Final report · Apr 27, 2018 · N6933M · Substantial damage
  > The pilot’s exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.
- [NTSB GAA18CA156](https://openairdocs.org/ntsb/GAA18CA156.md): Stinson 108 · Cedar Rapids, IA · Accident · No injuries · Data collection · Final report · Mar 11, 2018 · N9457K · Substantial damage
  > The pilot’s improper landing flare, which resulted in a loss of directional control and a nose-over.
- [NTSB GAA18CA028](https://openairdocs.org/ntsb/GAA18CA028.md): Stinson 108 · Lewiston, ID · Accident · No injuries · Data collection · Final report · Oct 26, 2017 · N927D · Substantial damage
  > The pilot’s failure to maintain directional control during the landing roll. Contributing to the accident was the pilot’s failure to obtain appropriate training in the airplane before flying solo.
- [NTSB ERA17LA182](https://openairdocs.org/ntsb/ERA17LA182.md): Stinson 108 · West Creek, NJ · Accident · Minor injuries · Limited investigation · Final report · May 17, 2017 · N9366K · Substantial damage
  > A total loss of engine power due to the No. 4 cylinder’s exhaust valve getting stuck and the subsequent fracturing of the valve face stem.
- [NTSB GAA17CA224](https://openairdocs.org/ntsb/GAA17CA224.md): Stinson 108 · Woodruff, WI · Accident · No injuries · Data collection · Final report · Apr 7, 2017 · N9363K · Substantial damage
  > The pilot receiving instruction's incorrect brake usage and failure to maintain directional control during the landing roll.
- [NTSB GAA17CA153](https://openairdocs.org/ntsb/GAA17CA153.md): Stinson 108 · Valparaiso, IN · Accident · No injuries · Data collection · Final report · Feb 20, 2017 · N9277K · Substantial damage
  > The pilot’s failure to maintain directional control while landing with a crosswind.
- [NTSB CEN17LA057](https://openairdocs.org/ntsb/CEN17LA057.md): Stinson 108-3 · Ionia, MI · Accident · No injuries · Limited investigation · Final report · Dec 16, 2016 · N812C · Substantial damage
  > A failure of the aft support cable on the left main landing ski due to an inadequately formed nicopress sleeve, which allowed the ski to rotate into a vertical position shortly after liftoff, and its unavoidable separation during the subsequent landing.
- [NTSB GAA17CA015](https://openairdocs.org/ntsb/GAA17CA015.md): Stinson 108 · Rifle, CO · Accident · No injuries · Data collection · Final report · Oct 6, 2016 · N4210C · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll, which resulted in a runway excursion.
- [NTSB GAA16CA424](https://openairdocs.org/ntsb/GAA16CA424.md): Stinson 108 · Sunriver, OR · Accident · No injuries · Data collection · Final report · Aug 5, 2016 · N9250K · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll in gusting wind conditions, which resulted in runway excursion and nose-over.
- [NTSB CEN16LA287](https://openairdocs.org/ntsb/CEN16LA287.md): Stinson 108 · Dodge Center, MN · Accident · Minor injuries · Limited investigation · Final report · Jul 22, 2016 · N8019K · Substantial damage
  > A partial loss of engine power due to carburetor ice.
- [NTSB GAA16CA369](https://openairdocs.org/ntsb/GAA16CA369.md): Stinson 108 · Red Lodge, MT · Accident · No injuries · Data collection · Final report · Jul 8, 2016 · N955C · Substantial damage
  > A deer running across the runway and impacting the left side of the airplane, resulting in a loss of directional control, a runway excursion, and a ground loop.
- [NTSB GAA16CA221](https://openairdocs.org/ntsb/GAA16CA221.md): Stinson 108 · Batavia, OH · Accident · No injuries · Data collection · Final report · May 6, 2016 · N8068K · Substantial damage
  > The pilot's failure to maintain directional control during landing, which resulted in a runway excursion. Contributing to the accident was the pilot's incorrect brake application during the runway excursion, which resulted in a nose over.
- [NTSB WPR16CA077](https://openairdocs.org/ntsb/WPR16CA077.md): Stinson 108 3 · Livermore, CA · Accident · No injuries · Data collection · Final report · Feb 25, 2016 · N862C · Substantial damage
  > The pilot's failure to maintain directional control during the landing roll. Contributing to the accident was maintenance personnel's failure to detect the worn tailwheel assembly during the airplane's annual inspection.
- [NTSB GAA15LA265](https://openairdocs.org/ntsb/GAA15LA265.md): Stinson 108 · Palmer, AK · Accident · Serious injuries · Limited investigation · Final report · Sep 20, 2015 · N6066M · Substantial damage
  > The pilot's failure to maintain adequate airspeed and his exceedance of the airplane’s critical angle-of-attack during final approach to landing, which resulted in an aerodynamic stall and impact with terrain.
- [NTSB WPR15LA223](https://openairdocs.org/ntsb/WPR15LA223.md): Stinson 108 - 3 · North Las Vegas, NV · Accident · No injuries · Limited investigation · Final report · Jul 25, 2015 · N6152M · Substantial damage
  > The partial loss of engine power due to a degraded cylinder exhaust valve seal, which resulted in low cylinder compression.
- [NTSB CEN14CA183](https://openairdocs.org/ntsb/CEN14CA183.md): Stinson 108 · Broomfield, CO · Accident · No injuries · Data collection · Final report · Mar 14, 2014 · N9538K · Substantial damage
  > The pilot's failure to maintain directional control during the landing, which resulted in the airplane departing the runway and nosing over.
- [NTSB WPR13LA320](https://openairdocs.org/ntsb/WPR13LA320.md): Stinson 108-3 · Blackfoot, ID · Accident · No injuries · Limited investigation · Final report · Jul 10, 2013 · N703C · Substantial damage
  > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination revealed no mechanical malfunctions or failures that would have precluded normal operation.
- [NTSB CEN13LA305](https://openairdocs.org/ntsb/CEN13LA305.md): Stinson 108-3 · Beaumont, TX · Accident · Minor injuries · Limited investigation · Final report · May 23, 2013 · N121CM · Substantial damage
  > The lack of a forward clamp on the carburetor heat box rubber boot, which allowed the boot to be ingested into the inlet of the carburetor heat box, restricting the airflow and leading to a subsequent partial loss of engine power.
- [NTSB CEN13LA091](https://openairdocs.org/ntsb/CEN13LA091.md): Stinson 108-2 · Halfway, MO · Accident · Minor injuries · Limited investigation · Final report · Dec 5, 2012 · N8775K · Substantial damage
  > The pilot's failure to properly maintain the airplane and engine, which resulted in a total loss of engine power due to improperly installed magnetos and a broken camshaft.
- [NTSB WPR12LA283](https://openairdocs.org/ntsb/WPR12LA283.md): Stinson 108 · Stanley, ID · Accident · Serious injuries · Limited investigation · Final report · Jun 30, 2012 · N773C · Substantial damage
  > The pilot’s inadequate preflight planning and decision to takeoff at a density altitude outside of the airplane’s takeoff performance envelope, with a tailwind, and near the airplane’s maximum gross weight, which resulted in the airplane’s inability to climb…
- [NTSB WPR12CA291](https://openairdocs.org/ntsb/WPR12CA291.md): Stinson 108-2 · Mile Hi Landing Strip, ID · Accident · No injuries · Data collection · Final report · Jun 25, 2012 · N247C · Substantial damage
  > The pilot's misjudgment of the speed and distance required to land, which resulted in a runway overrun.
- [NTSB WPR12CA129](https://openairdocs.org/ntsb/WPR12CA129.md): Stinson 108-3 · Santa Clarita, CA · Accident · Minor injuries · Data collection · Final report · Mar 12, 2012 · N4143C · Substantial damage
  > The pilot's delayed decision to abandon the landing attempt, which resulted in the airplane colliding with rising terrain. Contributing to the accident was the pilot's decision to land with a tailwind.
- [NTSB ERA12CA064](https://openairdocs.org/ntsb/ERA12CA064.md): Stinson 108-3 · Whitefield, NH · Accident · No injuries · Data collection · Final report · Nov 5, 2011 · N6263M · Substantial damage
  > The student pilot did not maintain directional control during the landing flare.
- [NTSB WPR11LA307](https://openairdocs.org/ntsb/WPR11LA307.md): Stinson 108-2 · Columbia, CA · Accident · Minor injuries · Limited investigation · Final report · Jul 5, 2011 · N9351K · Substantial damage
  > The airplane’s failure to climb at a sufficient rate to clear trees and terrain beyond the end of the runway for reasons that could not be determined because postaccident examination did not reveal any mechanical malfunctions or failures that would have…
- [NTSB CEN10CA214](https://openairdocs.org/ntsb/CEN10CA214.md): Stinson 108-2 · Dexter, MO · Accident · No injuries · Data collection · Final report · Apr 17, 2010 · N988D · Substantial damage
  > A loss of engine power for an undetermined reason.

Next page: https://openairdocs.org/ntsb.md?engine=27025&status=final&page=2

## 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."completionStatus" = 'Completed'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27025'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27025&status=final

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