# NTSB investigations: Franklin 6A-350SER A list on [Franklin 6A-350SER](https://openairdocs.org/engine/franklin-6a-350ser.md). Matched to the registry by N-number and event date, newest first. - [NTSB ANC25LA059](https://openairdocs.org/ntsb/ANC25LA059.md): Cessna 170B · Denali Park, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 25, 2025 · N2655D · Substantial damage > The failure of the left main landing gear spring due to a fatigue fracture during landing on uneven terrain. - [NTSB WPR23LA131](https://openairdocs.org/ntsb/WPR23LA131.md): Maule M-4-220C · Santa Ynez, CA · Accident · Minor injuries · Class 4 · Limited · Final report · Mar 18, 2023 · N40635 · Substantial damage > The pilot’s inadequate fuel planning, which resulted in a loss of engine power due to fuel starvation. - [NTSB WPR23LA134](https://openairdocs.org/ntsb/WPR23LA134.md): Harris Robert W Zenith CH 801 · Brigham City, UT · Accident · No injuries · Class 3 · Limited · Final report · Mar 11, 2023 · N639BH · Substantial damage > The pilot’s improper flare, which resulted in a hard landing following a reported loss of engine thrust for undetermined reasons. - [NTSB ERA21LA009](https://openairdocs.org/ntsb/ERA21LA009.md): Watson Michael A Velocity Elite RG · Lady Lake, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Oct 6, 2020 · N78BM · Substantial damage > A total loss of engine power during cruise flight for undetermined reasons. - [NTSB ERA20LA077](https://openairdocs.org/ntsb/ERA20LA077.md): Velocity Elite RG · St. Petersburg, FL · Accident · No injuries · Class 3 · Limited · Final report · Jan 14, 2020 · N78BM · Substantial damage > A failure of the propeller pitch change electric motor, which resulted in an improper setting for takeoff and a subsequent runway overrun. Also causal was the inadequate maintenance and inspection of the propeller system and the pilot’s failure to follow the… - [NTSB ERA18TA255](https://openairdocs.org/ntsb/ERA18TA255.md): Calvin Nate H Velocity STD RG E · Kingsport, TN · Accident · Serious injuries · Final report · Sep 20, 2018 · N67WR · Substantial damage > The pilot's failure to use carburetor heat in conditions conducive to serious carburetor icing at glide power, which resulted in a partial loss of power and an aerodynamic stall. - [NTSB WPR16FA001](https://openairdocs.org/ntsb/WPR16FA001.md): Johnson Coot · Deer Park, WA · Accident · 1 fatal · Field investigation · Final report · Oct 2, 2015 · N69BD · Destroyed > The pilot's failure to maintain sufficient airspeed and his exceedance of the airplane's critical angle of attack, which resulted in an aerodynamic stall and subsequent spin. Contributing to the accident was the pilot's diverted attention due to the rough… - [NTSB ANC13CA101](https://openairdocs.org/ntsb/ANC13CA101.md): Cessna 170B · Iliamna, AK · Accident · No injuries · Data collection · Final report · Sep 14, 2013 · N2736C · Substantial damage > The pilot's inadvertent encounter with a mound while landing on a remote airstrip. - [NTSB ERA13LA268](https://openairdocs.org/ntsb/ERA13LA268.md): Maule M-4-220C · Fredericksburg, PA · Accident · Minor injuries · Limited investigation · Final report · Jun 1, 2013 · N40337 · Substantial damage > A total loss of engine power due to the fatigue failure of the No. 4 cylinder piston pin. - [NTSB ERA12CA010](https://openairdocs.org/ntsb/ERA12CA010.md): Calvin Nate H CALVIN-VELOCITY · Sebastian, FL · Accident · No injuries · Data collection · Final report · Oct 6, 2011 · N67WR · Substantial damage > The pilot's failure to maintain the proper approach path, which resulted in a runway undershoot and collision with terrain prior to the runway. - [NTSB WPR11LA444](https://openairdocs.org/ntsb/WPR11LA444.md): Maule M-4-220C · Show Low, AZ · Accident · Minor injuries · Limited investigation · Final report · Sep 10, 2011 · N40625 · Substantial damage > The pilot’s failure to maintain directional control during the landing, which resulted in a ground loop. - [NTSB ERA10LA107](https://openairdocs.org/ntsb/ERA10LA107.md): Maule M5 · LaGrange, GA · Accident · No injuries · Limited investigation · Final report · Dec 6, 2009 · N51620 · Substantial damage > The failure of the right main landing gear for undetermined reasons. - [NTSB WPR09LA217](https://openairdocs.org/ntsb/WPR09LA217.md): Goodacre CA4-HP · Mansfield, WA · Accident · Minor injuries · Limited investigation · Final report · Apr 26, 2009 · N33254 · Substantial damage > The pilot's failure to maintain aircraft control while landing with a known crosswind condition. - [NTSB NYC08LA280](https://openairdocs.org/ntsb/NYC08LA280.md): Socata MS894A · Fulton, NY · Accident · Minor injuries · Limited investigation · Final report · Aug 16, 2008 · N31BF · Substantial damage > A loss of engine power due to fatigue failure of the crankshaft and the No. 3 engine cylinder connecting rod as a result of improper machining of the engine crankshaft during engine overhaul by maintenance personnel. - [NTSB SEA04LA062](https://openairdocs.org/ntsb/SEA04LA062.md): Davenport RV-8F · College Place, WA · Accident · 1 fatal · Limited investigation · Final report · Apr 1, 2004 · N284DM · Substantial damage > A loss of engine power for undetermined reason(s) and the pilot's failure to maintain adequate flying airspeed during the forced landing. A contributing factor was the pilot's decision to attempt a turn at low altitude. - [NTSB ANC03LA083](https://openairdocs.org/ntsb/ANC03LA083.md): Maule M-4 · Kobuk, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2003 · N40344 · Substantial damage > The pilot's inadvertent use of diesel fuel in a gasoline engine which resulted in a partial loss of engine power, and subsequent collision with trees during a forced landing after takeoff. A factor contributing to the accident was the pilot's inadequate… - [NTSB NYC00FA112](https://openairdocs.org/ntsb/NYC00FA112.md): Cessna 172H · Grottoes, VA · Accident · 1 fatal · Field investigation · Final report · Apr 14, 2000 · N1404F · Destroyed > The pilot's loss of control of the airplane in instrument meteorological conditions, which resulted in an inadvertent stall/spin. Factors included the pilot's lack of instrument time under actual conditions, and his lack of recent instrument flight experience. - [NTSB IAD00LA030](https://openairdocs.org/ntsb/IAD00LA030.md): Maule M-4-220C · Lincoln Park, NJ · Accident · Serious injuries · Limited investigation · Final report · Mar 31, 2000 · N2060U · Substantial damage > the pilot's failure to maintain control during landing roll. A factor was the crosswind. - [NTSB CHI99WA194](https://openairdocs.org/ntsb/CHI99WA194.md): Maule M-5-220C · Lake St. John, Canada · Accident · 2 fatal · Foreign investigation · Jun 22, 1999 · N62041 · Substantial damage - [NTSB LAX99LA084](https://openairdocs.org/ntsb/LAX99LA084.md): Maule M-4-220C · Jean, NV · Accident · No injuries · Limited investigation · Final report · Jan 30, 1999 · N474W · Substantial damage > Fuel starvation due to the pilot's failure to ensure that a tank containing an adequate fuel supply was selected for takeoff. A factor in the accident was the contamination in the engine driven fuel pump, which likely was not capable of providing full system… - [NTSB CHI98LA129](https://openairdocs.org/ntsb/CHI98LA129.md): Good Velocity · Romulus, MI · Accident · 1 fatal · Limited investigation · Final report · Apr 19, 1998 · N234Q · Destroyed > improper planning/decision by the pilot, by using the airplane in an illegal activity and allowing the fuel to be exhausted before landing. Factors relating to this accident were: the pilot being under pressure to reach his destination with his illegal cargo,… - [NTSB CHI97FA146](https://openairdocs.org/ntsb/CHI97FA146.md): Henry Barracuda · Antonia, MO · Accident · 2 fatal · Field investigation · Final report · May 26, 1997 · N5926 · Destroyed > inadvertent flight by the pilot into instrument meteorological conditions (IMC), spatial disorientation of the pilot, which led to his loss of aircraft control, and the pilot exceeding the design stress limits of the airplane, which led to an in-flight… - [NTSB CHI96LA132](https://openairdocs.org/ntsb/CHI96LA132.md): Siai-Marchetti S.205/22R · Anoka, MN · Accident · No injuries · Limited investigation · Final report · Apr 13, 1996 · N954W · Substantial damage > A loose exhaust system that had become disconnected and blocked, which resulted in partial loss of engine power. - [NTSB LAX92LA040](https://openairdocs.org/ntsb/LAX92LA040.md): Maule M4-220C · Coolidge, AZ · Accident · No injuries · Limited investigation · Final report · Nov 8, 1991 · N40625 · Substantial damage > The pilot's failure to maintain directional control of the aircraft during the takeoff ground run due to inadequate compensation for the existing wind conditions. A factor in this accident was the unfavorable wind reported by the pilot. - [NTSB ANC91LA078](https://openairdocs.org/ntsb/ANC91LA078.md): Maule M4-220-C · Fairbanks, AK · Accident · No injuries · Limited investigation · Final report · Jun 21, 1991 · N40304 · Substantial damage > The pilot's failure to maintain airspeed during the initial climb and exceeding the gross weight of the airplane. Contributing to the accident was high vegetation. - [NTSB ANC88LA143](https://openairdocs.org/ntsb/ANC88LA143.md): Maule M-4 · Cordova, AK · Accident · No injuries · Limited investigation · Final report · Sep 18, 1988 · N2044U · Substantial damage > While on base leg to the airport, the engine stopped producing power forcing the pilot to land the airplane on the tundra short of the runway. Upon landing the airplane nosed over. Subsequent examination of the engine showed water in the carburetor. The water… - [NTSB DEN84LA146](https://openairdocs.org/ntsb/DEN84LA146.md): Maule M-4-220C · Winner, SD · Accident · No injuries · Limited investigation · Final report · May 10, 1984 · N40352 · Substantial damage > The plt reported that a gust of wind was encountered during the landing roll. The acft swerved to the right & left rudder did not correct the situation. The acft left the rwy & collided with a ditch. The plt said that he examined the tailwheel after the… - [NTSB NYC84LA045](https://openairdocs.org/ntsb/NYC84LA045.md): Maule M-5 · Somersworth, NH · Accident · Minor injuries · Limited investigation · Final report · Dec 4, 1983 · N62042 · Substantial damage > The acft was damaged in a forced landing after the engine quit during a descent. The plt had been cruising at 2500 ft. upon descending to 800 ft in the skyhaven area the plt applied power but the engine did not respond. An airstart attemptwas unsuccessful and… - [NTSB SEA83LA090](https://openairdocs.org/ntsb/SEA83LA090.md): Maule M-4-220C · Malad City, ID · Accident · No injuries · Limited investigation · Final report · Apr 26, 1983 · N40314 · Substantial damage > During an interview, the plt reported that he had removed ice from the acft & attempted to depart from a snow covered alfalfa field, aprx 1000 ft long. The acft did not become airborne & the plt elected to abort the takeoff. During the abort, the acft… - [NTSB CHI83LA082](https://openairdocs.org/ntsb/CHI83LA082.md): Maule M4-180C · Brainerd, MN · Accident · No injuries · Limited investigation · Final report · Jan 15, 1983 · N2062U · Substantial damage > The aircraft experienced power failure during slow descent to enter traffic pattern after a test hop. A landing was accomplished in an open snow covered field. During the roll-out in the 18 inch deep snow the aircraft nosed over. Preliminary examination of… - [NTSB LAX82DA142](https://openairdocs.org/ntsb/LAX82DA142.md): Maule M-4 · Wickenburg, AZ · Accident · No injuries · Final report · Apr 20, 1982 · N40625 · Substantial damage > During landing roll the left wing came up and the aircraft turned sharply to the right. The aircraft left the runway and came to rest in a gully. - [NTSB CHI81FEM13](https://openairdocs.org/ntsb/CHI81FEM13.md): Maule M4 · Weidman, WI · Accident · No injuries · Closed · Apr 18, 1981 · N40312 · Substantial damage - [NTSB SEA79DYP05](https://openairdocs.org/ntsb/SEA79DYP05.md): Maule M4220C · Coeur D'Alene, ID · Accident · No injuries · Closed · Dec 17, 1978 · N40314 · Substantial damage - [NTSB ANC78FAA22](https://openairdocs.org/ntsb/ANC78FAA22-140259.md): Maule M-4 · North Pole, AK · Accident · Minor injuries · Closed · Jun 7, 1978 · N2062U · Substantial damage - [NTSB OAK76DVG20](https://openairdocs.org/ntsb/OAK76DVG20.md): Maule M4220C · Ruth, CA · Accident · No injuries · Closed · Sep 3, 1975 · N40635 · Substantial damage - [NTSB ANC75DAA06](https://openairdocs.org/ntsb/ANC75DAA06.md): Maule M4180C · Fairbanks, AK · Accident · No injuries · Closed · Aug 27, 1974 · N2062U · Substantial damage - [NTSB MKC75FCD04](https://openairdocs.org/ntsb/MKC75FCD04.md): Maule M-4 · West Liberty, IA · Accident · Minor injuries · Closed · Jul 27, 1974 · N40638 · Substantial damage - [NTSB FTW75FQD02](https://openairdocs.org/ntsb/FTW75FQD02.md): Maule M-4 · El Paso, TX · Accident · No injuries · Closed · Jul 7, 1974 · N9RH · Substantial damage - [NTSB MIA74DLE01](https://openairdocs.org/ntsb/MIA74DLE01.md): Maule M4-200 · Winter Haven, FL · Accident · No injuries · Closed · Jun 12, 1974 · N2067U · Substantial damage - [NTSB SEA74DYG24](https://openairdocs.org/ntsb/SEA74DYG24.md): Maule M-4 · St.John, WA · Accident · Minor injuries · Closed · Feb 21, 1974 · N40352 · Substantial damage - [NTSB MIA74FLA25](https://openairdocs.org/ntsb/MIA74FLA25.md): Maule M4220C · Ft George, FL · Accident · No injuries · Closed · Nov 25, 1973 · N40650 · Substantial damage - [NTSB OAK74FXQ01](https://openairdocs.org/ntsb/OAK74FXQ01.md): Maule 220-C · Reno, NV · Accident · No injuries · Closed · Jul 21, 1973 · N40634 · Substantial damage - [NTSB LAX73FUA42](https://openairdocs.org/ntsb/LAX73FUA42.md): Maule M4220C · Long Beach, CA · Accident · No injuries · Closed · May 14, 1973 · N40633 · Substantial damage - [NTSB DEN73DTE61](https://openairdocs.org/ntsb/DEN73DTE61.md): Maule M4220C · La Junta, CO · Accident · Minor injuries · Closed · Feb 25, 1973 · N40634 · Substantial damage - [NTSB MIA72FLD06](https://openairdocs.org/ntsb/MIA72FLD06.md): Maule M-4 · Dunellen, FL · Accident · No injuries · Closed · Aug 14, 1971 · N2067U · Substantial damage - [NTSB NYC71IN103](https://openairdocs.org/ntsb/NYC71IN103.md): M-Saulnier MS894A · Morristown, NJ · Incident · No injuries · Closed · Apr 13, 1971 · N1516W · Minor damage - [NTSB OAK68D0344](https://openairdocs.org/ntsb/OAK68D0344-201103.md): Cessna 170A · Half Mon By, CA · Accident · No injuries · Closed · Dec 9, 1967 · N3843V · 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_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey WHERE a.engine_model_code IN ('27023') ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/engine/franklin-6a-350ser/ntsb --- 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.