NTSB investigations: Franklin 6A4165 series
438 cases on aircraft whose registry engine model is Franklin 6A4165 series. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1964 | 27 |
|---|---|
| 1965 | 20 |
| 1966 | 22 |
| 1967 | 16 |
| 1968 | 20 |
| 1969 | 16 |
| 1970 | 14 |
| 1971 | 16 |
| 1972 | 14 |
| 1973 | 12 |
| 1974 | 7 |
| 1975 | 11 |
| 1976 | 13 |
| 1977 | 12 |
| 1978 | 18 |
| 1979 | 6 |
| 1980 | 6 |
| 1981 | 1 |
| 1982 | 8 |
| 1983 | 3 |
| 1984 | 11 |
| 1985 | 3 |
| 1986 | 7 |
| 1987 | 4 |
| 1988 | 4 |
| 1989 | 5 |
| 1990 | 7 |
| 1991 | 3 |
| 1992 | 3 |
| 1993 | 4 |
| 1994 | 4 |
| 1995 | 7 |
| 1996 | 9 |
| 1997 | 1 |
| 1998 | 2 |
| 1999 | 6 |
| 2000 | 7 |
| 2001 | 8 |
| 2002 | 5 |
| 2003 | 6 |
| 2004 | 4 |
| 2006 | 2 |
| 2007 | 3 |
| 2008 | 4 |
| 2009 | 4 |
| 2010 | 2 |
| 2011 | 2 |
| 2012 | 4 |
| 2013 | 2 |
| 2014 | 1 |
| 2015 | 2 |
| 2016 | 7 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 7 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 3 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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.\"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"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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."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" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB WPR26LA183Accident · No injuriesClass 3 · LimitedPreliminary reportStinson 108-3 · Quilcene, WAOn May 12, 2026, at about 1049 Pacific daylight time, a Stinson 108-3 airplane, N588C, was substantially damaged when it was involved in an accident near Quilcene, Washington. The pilot was uninjured. The airplane was operated as a Title 14 Code of Federal…NTSB ERA26LA108Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-3 · Palmetto, FLThe pilot's inadequate preflight fuel planning, which resulted in a total loss of engine power due to fuel exhaustion.NTSB CEN26LA087Accident · Minor injuriesClass 3 · LimitedPreliminary reportStinson 108-3 · Gypsum, COOn January 11, 2026, at 1408 mountain standard time, a Stinson 108-3 airplane, N6725M, sustained substantial damage when it was involved in an accident near Gypsum, Colorado. The pilot sustained minor injuries. The airplane was operated as a Title 14 Code of…NTSB ANC25LA058Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-8 · Alexander Creek, AKThe 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 WPR25LA179Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-2 · East Wenatchee, WAThe pilot’s failure to maintain directional control during the landing roll with a left crosswind.NTSB ANC25LA036Accident · Minor injuriesClass 4 · LimitedFinal reportStinson 108 · North Pole, AKThe 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 ANC24LA048Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-2 · Bethel, AKThe 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 ERA24LA210Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-2 · Titusville, FLThe 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 ERA24LA052Accident · No injuriesClass 4 · LimitedFinal reportStinson 108-2 · Martinsville, VAThe 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 WPR23LA117Accident · No injuriesClass 3 · LimitedFinal reportStinson 108 · Lampasas, TXImproper case hardening of the crankshaft timing gear, which resulted in the fatigue failure of the gear and a total loss of engine power.NTSB ERA22LA333Accident · No injuriesClass 3 · LimitedFinal reportStinson 108 · Batesburg, SCThe fatigue failure of the crankshaft gear, resulting in a total loss of engine power.NTSB WPR22LA085Accident · No injuriesClass 4 · LimitedFinal reportUniversal Stinson 108-2 · Byron, CAThe 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 ANC21LA086Accident · No injuriesClass 3 · LimitedFinal reportStinson 108-3 · Port Alsworth, AKA loss of directional control for reasons that could not be determined based on the available information.NTSB WPR21LA251Accident · Serious injuriesClass 4 · LimitedFinal reportStinson 108-3 · Stevenson, WAA 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 WPR21LA064Accident · No injuriesClass 3 · LimitedFinal reportStinson 108-3 · El Monte, CAA loss of directional control during the landing roll due to an undetermined failure of the tailwheel assembly.NTSB ERA20LA320Accident · Minor injuriesClass 3 · LimitedFinal reportStinson 108 · Newport, PAA 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 CEN20LA377Accident · No injuriesClass 3 · LimitedFinal reportStinson 108-3 · Coleman, MIThe pilot’s improper installation of the generator drive gear, which resulted in a total loss of engine power.NTSB CEN20LA345Accident · No injuriesClass 3 · LimitedFinal reportStinson 108 · Glenwood Springs, COThe pilot’s loss of directional control upon landing due to a sheared tailwheel locking pin.NTSB WPR20CA236Accident · No injuriesClass 4 · Data collectionFinal reportStinson 108 · Farewell Lakes, AKThe pilot's delayed decision to abort the takeoff roll, which resulted in a runway overrun and airplane nose over.NTSB ANC20CA063Accident · No injuriesClass 4 · Data collectionFinal reportStinson 108 · Nikolai, AKThe pilot's improper decision to depart from an unsuitable off-airport surface which resulted in a departure area excursion and impact with trees.NTSB CEN20CA204Accident · No injuriesClass 4 · Data collectionFinal reportStinson 108 · Denver, COThe pilot’s failure to maintain directional control while landing during variable wind conditions.NTSB ANC19TA055Accident · Serious injuriesClass 4Final reportStinson 108 · Tyonek, AKThe 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 CEN19LA222Accident · Serious injuriesClass 3 · LimitedFinal reportStinson 108 · Clinton, ARA partial loss of engine power for undetermined reasons.NTSB WPR19LA207Accident · No injuriesClass 3 · LimitedFinal reportStinson 108 · Klamath Falls, ORThe 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 WPR19LA179Accident · Minor injuriesClass 3 · LimitedFinal reportStinson 108 · Caldwell, IDA 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 GAA19CA263Accident · No injuriesData collectionFinal reportStinson 108 · Soldotna, AKThe pilot's overapplication of the brakes during landing on a soft runway, which resulted in a nose-over.NTSB ERA18LA242Accident · Serious injuriesClass 3 · LimitedFinal reportStinson 108 · Indiana, PAA total loss of engine power as a result of debris contamination of the fuel, which resulted in fuel starvation.NTSB GAA18CA237Accident · Minor injuriesData collectionFinal reportStinson 108 · Eliza Island, WAThe pilot’s exceedance of the airplane’s critical angle of attack during takeoff, which resulted in an aerodynamic stall.NTSB GAA18CA156Accident · No injuriesData collectionFinal reportStinson 108 · Cedar Rapids, IAThe pilot’s improper landing flare, which resulted in a loss of directional control and a nose-over.NTSB GAA18CA028Accident · No injuriesData collectionFinal reportStinson 108 · Lewiston, IDThe 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 ERA17LA182Accident · Minor injuriesLimited investigationFinal reportStinson 108 · West Creek, NJA 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 GAA17CA224Accident · No injuriesData collectionFinal reportStinson 108 · Woodruff, WIThe pilot receiving instruction's incorrect brake usage and failure to maintain directional control during the landing roll.NTSB GAA17CA153Accident · No injuriesData collectionFinal reportStinson 108 · Valparaiso, INThe pilot’s failure to maintain directional control while landing with a crosswind.NTSB CEN17LA057Accident · No injuriesLimited investigationFinal reportStinson 108-3 · Ionia, MIA 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 GAA17CA015Accident · No injuriesData collectionFinal reportStinson 108 · Rifle, COThe pilot's failure to maintain directional control during the landing roll, which resulted in a runway excursion.NTSB GAA16CA424Accident · No injuriesData collectionFinal reportStinson 108 · Sunriver, ORThe pilot's failure to maintain directional control during the landing roll in gusting wind conditions, which resulted in runway excursion and nose-over.NTSB CEN16LA287Accident · Minor injuriesLimited investigationFinal reportStinson 108 · Dodge Center, MNA partial loss of engine power due to carburetor ice.NTSB GAA16CA369Accident · No injuriesData collectionFinal reportStinson 108 · Red Lodge, MTA 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 GAA16CA221Accident · No injuriesData collectionFinal reportStinson 108 · Batavia, OHThe 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 WPR16CA077Accident · No injuriesData collectionFinal reportStinson 108 3 · Livermore, CAThe 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 GAA15LA265Accident · Serious injuriesLimited investigationFinal reportStinson 108 · Palmer, AKThe 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 WPR15LA223Accident · No injuriesLimited investigationFinal reportStinson 108 - 3 · North Las Vegas, NVThe partial loss of engine power due to a degraded cylinder exhaust valve seal, which resulted in low cylinder compression.NTSB CEN14CA183Accident · No injuriesData collectionFinal reportStinson 108 · Broomfield, COThe pilot's failure to maintain directional control during the landing, which resulted in the airplane departing the runway and nosing over.NTSB WPR13LA320Accident · No injuriesLimited investigationFinal reportStinson 108-3 · Blackfoot, IDA 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 CEN13LA305Accident · Minor injuriesLimited investigationFinal reportStinson 108-3 · Beaumont, TXThe 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 CEN13LA091Accident · Minor injuriesLimited investigationFinal reportStinson 108-2 · Halfway, MOThe 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 WPR12LA283Accident · Serious injuriesLimited investigationFinal reportStinson 108 · Stanley, IDThe 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 WPR12CA291Accident · No injuriesData collectionFinal reportStinson 108-2 · Mile Hi Landing Strip, IDThe pilot's misjudgment of the speed and distance required to land, which resulted in a runway overrun.NTSB WPR12CA129Accident · Minor injuriesData collectionFinal reportStinson 108-3 · Santa Clarita, CAThe 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 ERA12CA064Accident · No injuriesData collectionFinal reportStinson 108-3 · Whitefield, NHThe student pilot did not maintain directional control during the landing flare.