# NTSB investigations: Continental IO-520 series, MT 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 2 · 68 cases ## Latest cases - [NTSB WPR26LA360](https://openairdocs.org/ntsb/WPR26LA360.md): Cessna A185F · Livingston, MT · Accident · No injuries · Class 4 · Limited · Investigation open · Sep 26, 2026 · N185BZ · Substantial damage - [NTSB WPR25LA047](https://openairdocs.org/ntsb/WPR25LA047.md): Cessna A185F · Lewistown, MT · Accident · No injuries · Class 4 · Limited · Final report · Nov 23, 2024 · N9533H · Substantial damage > The pilot’s inadvertent impact with a rock during a landing on a grass strip. - [NTSB WPR23LA331](https://openairdocs.org/ntsb/WPR23LA331.md): Beech N35 · Ennis, MT · Accident · No injuries · Class 4 · Limited · Final report · Aug 31, 2023 · N92NJ · Substantial damage > The pilot's failure to extend the landing gear before landing. - [NTSB WPR21FA353](https://openairdocs.org/ntsb/WPR21FA353.md): Beech S35 · Billings, MT · Accident · 2 fatal · Class 3 · Field · Final report · Sep 27, 2021 · N354M · Destroyed > The pilot’s improper flare, which led to a hard landing, subsequent loss of control, and collision with trees. - [NTSB WPR20CA250](https://openairdocs.org/ntsb/WPR20CA250.md): Cessna A185 · Kalispell, MT · Accident · No injuries · Class 4 · Data collection · Final report · Aug 3, 2020 · N185GK · Substantial damage > The pilot's excessive speed while landing on a wet grass runway, which resulted in a runway excursion and impact with a fence. - [NTSB WPR20CA183](https://openairdocs.org/ntsb/WPR20CA183.md): Cessna 310 · Butte, MT · Accident · No injuries · Class 4 · Data collection · Final report · Jun 15, 2020 · N87395 · Substantial damage > The pilot's failure to maintain clearance from a fence post during final approach which resulted in a damage to the left main landing gear, and its subsequent collapse during landing. - [NTSB WPR19LA134](https://openairdocs.org/ntsb/WPR19LA134.md): Cessna A185 · Kalispell, MT · Accident · No injuries · Class 3 · Limited · Final report · May 4, 2019 · N185FT · Substantial damage > The loss of directional control during landing for reasons that could not be determined based on available evidence. - [NTSB GAA17CA212](https://openairdocs.org/ntsb/GAA17CA212.md): Thomas Craig E Wittman W-10 · Stevensville, MT · Accident · No injuries · Data collection · Final report · Mar 28, 2017 · N13XZ · Substantial damage > The pilot’s decision to take off with a known master brake cylinder leak and his subsequent failure to maintain directional control during landing. - [NTSB WPR15LA198](https://openairdocs.org/ntsb/WPR15LA198.md): Cessna TU206F · Schafers Meadows, MT · Accident · Serious injuries · Limited investigation · Final report · Jun 23, 2015 · N8424Q · Substantial damage > The pilot's failure to maintain directional control of the airplane during the landing roll in variable and gusting wind conditions. - [NTSB WPR10CA024](https://openairdocs.org/ntsb/WPR10CA024.md): Cessna A185F · Sand Coulee, MT · Accident · No injuries · Data collection · Final report · Oct 18, 2009 · N1677R · Substantial damage > The pilot's failure to maintain directional control during landing with a crosswind. - [NTSB SEA07LA210](https://openairdocs.org/ntsb/SEA07LA210.md): Beech E-33C · Laurel, MT · Accident · No injuries · Limited investigation · Final report · Jul 17, 2007 · N7927R · Substantial damage > The overload failure of the nose gear retract brace (drag link) during the landing roll. - [NTSB SEA06LA114](https://openairdocs.org/ntsb/SEA06LA114.md): Beech A36 · Ennis, MT · Accident · No injuries · Limited investigation · Final report · Jun 6, 2006 · N24BF · Substantial damage > The loss of engine power during takeoff due to an excessively lean fuel-to-air mixture ratio as a result of excessive mating surface wear between the mixture control arm and metering shaft. A factor was the improper installation of the new engine, which… - [NTSB SEA06CA087](https://openairdocs.org/ntsb/SEA06CA087.md): Cessna 310R · Billings, MT · Accident · No injuries · Data collection · Final report · Apr 19, 2006 · N954EA · Substantial damage > Collapse of the right main landing gear during the landing roll for an undetermined reason. - [NTSB SEA05FA124](https://openairdocs.org/ntsb/SEA05FA124.md): Cessna 320E · Missoula, MT · Accident · Serious injuries · Field investigation · Final report · Jun 21, 2005 · N3438Q · Destroyed > Terrain clearance was not possible as a result of a right engine failure. Factors contributing to the accident included the rising terrain, foreign material being ingested into the engine's turbocharger, which obstructed the turbocharger's impeller, the… - [NTSB SEA05LA121](https://openairdocs.org/ntsb/SEA05LA121.md): Cessna 188A · Fairview, MT · Accident · Minor injuries · Limited investigation · Final report · Jun 20, 2005 · N2133U · Substantial damage > While in cruise flight a separation of a propeller blade as a result of a propeller hub crack. Factors contributing to the accident included the installation of an unapproved propeller, and the failure to properly service the propeller with red dyed oil for… - [NTSB SEA04GA192](https://openairdocs.org/ntsb/SEA04GA192.md): Cessna U206G · Essex, MT · Accident · 3 fatal · Final report · Sep 20, 2004 · N206SM · Destroyed > The pilot's misidentification of the airplane's location, which resulted in his improper decision to fly into the wrong drainage, and his failure to maintain terrain clearance while executing a turn to reverse course after he realized his navigational error.… - [NTSB SEA04CA138](https://openairdocs.org/ntsb/SEA04CA138.md): Cessna A185F · Cut Bank, MT · Accident · No injuries · Data collection · Final report · Jul 16, 2004 · N185S · Substantial damage > The pilot's failure to maintain directional control during the takeoff roll. - [NTSB SEA04LA117](https://openairdocs.org/ntsb/SEA04LA117.md): Cessna 185F · Bozeman, MT · Accident · No injuries · Limited investigation · Final report · Jun 24, 2004 · N4585F · Substantial damage > The failure of the right main gear brake disk attach flange during the landing roll, due to fatigue cracks emanating from numerous corrosion pits present on the surface of the disk, leading to the right brake becoming totally inoperative, and resulting in a… - [NTSB SEA04LA087](https://openairdocs.org/ntsb/SEA04LA087.md): Cessna 185A · Polson, MT · Accident · No injuries · Limited investigation · Final report · May 16, 2004 · N1624H · Substantial damage > The pilot's inadequate compensation for the changing wind conditions at the time of the landing. Factors include gusty, variable, crosswinds, and a runway marker near the edge of the runway the pilot was landing on. - [NTSB SEA02LA019](https://openairdocs.org/ntsb/SEA02LA019.md): Cessna 310 · Sidney, MT · Accident · No injuries · Limited investigation · Final report · Dec 6, 2001 · N5043J · Substantial damage > The pilot's improper abort procedure and inadequate remedial action, leading to a loss of directional control after losing power in one engine during the takeoff roll. Factors include the loss of power from one engine, and a fence around the perimeter of the… - [NTSB SEA99LA139](https://openairdocs.org/ntsb/SEA99LA139.md): Cessna 188B · Sidney, MT · Accident · No injuries · Limited investigation · Final report · Aug 9, 1999 · N9085R · Substantial damage > The pilot's failure to adequately compensate for wind conditions. - [NTSB SEA97LA087](https://openairdocs.org/ntsb/SEA97LA087.md): Cessna A185E · Billings, MT · Accident · No injuries · Limited investigation · Final report · Apr 16, 1997 · N70194 · Substantial damage > The flight instructor's inadequate compensation for the wind conditions. The crosswind conditions were a factor. - [NTSB SEA96LA011](https://openairdocs.org/ntsb/SEA96LA011.md): Cessna 210L · Lincoln, MT · Accident · No injuries · Limited investigation · Final report · Oct 24, 1995 · N1752X · Substantial damage > The failure of the pilot to follow the landing checklist and assure that the landing gear was extended. Factors relating to the accident were: the pilot's diverted attention, and an inoperative landing gear warning system. - [NTSB SEA95LA134](https://openairdocs.org/ntsb/SEA95LA134.md): Cessna 210B · Lewiston, MT · Accident · No injuries · Limited investigation · Final report · Jul 1, 1995 · N4GY · Substantial damage > Loss of engine power due to undetermined reasons, and the lack of a suitable area for the forced landing. - [NTSB SEA95LA050](https://openairdocs.org/ntsb/SEA95LA050.md): Beech S-35 · Wolf Point, MT · Accident · No injuries · Limited investigation · Final report · Feb 11, 1995 · N8828M · Substantial damage > The loss of power due to lost oil pressure and a failed connecting rod. Factors include fence posts and dusk lighting conditions which limited visibility. - [NTSB SEA94LA234](https://openairdocs.org/ntsb/SEA94LA234.md): Cessna A185F · Conrad, MT · Accident · No injuries · Limited investigation · Final report · Sep 7, 1994 · N5387H · Substantial damage > The cfi's failure to assure an adequate inspection of the aircraft, including the proper engagement and function of the rudder pedals, prior to the flight. - [NTSB SEA93LA188](https://openairdocs.org/ntsb/SEA93LA188.md): Cessna A188B · Three Forks, MT · Accident · Serious injuries · Limited investigation · Final report · Sep 2, 1993 · N21861 · Destroyed > The pilot's failure to maintain flying speed resulting in a stall/mush. The high density altitude and the pilot's failure to completely jettison his load were factors. - [NTSB SEA93LA096](https://openairdocs.org/ntsb/SEA93LA096.md): Cessna T-210N · Laurel, MT · Accident · Minor injuries · Limited investigation · Final report · Apr 15, 1993 · N9605Y · Substantial damage > The loss of engine power from fuel exhaustion due to the pilot's failure to ensure an adequate supply of fuel for the flt. - [NTSB SEA92LA179](https://openairdocs.org/ntsb/SEA92LA179.md): Cessna A185F · Ennis, MT · Accident · No injuries · Limited investigation · Final report · Aug 13, 1992 · N1207Q · Substantial damage > Directional control was not maintained. Factors to the accident were: a loose gravel airstrip, wind gusts and inadequate remedial action. - [NTSB SEA92LA134](https://openairdocs.org/ntsb/SEA92LA134.md): Cessna A185F · Ronan, MT · Accident · Minor injuries · Limited investigation · Final report · Jun 25, 1992 · N4690C · Substantial damage > The pilot's operation with known deficiencies in equipment and erratic operation of the fuel control system. A factor contributing to the accident was: soft terrain. - [NTSB SEA92LA071](https://openairdocs.org/ntsb/SEA92LA071.md): Cessna A185F · Billings, MT · Accident · No injuries · Limited investigation · Final report · Apr 9, 1992 · N135NC · Substantial damage > A worn tailwheel steering system and inadequate inspection of the airplane. A factor relating to the accident was the crosswind condition. - [NTSB SEA91LA206](https://openairdocs.org/ntsb/SEA91LA206.md): Beech V35B · Belgrade, MT · Accident · No injuries · Limited investigation · Final report · Aug 12, 1991 · N18307 · Substantial damage > The pilot's failure to maintain a positive rate of climb during the takeoff. Factors contributing to the accident were the open cabin window and the pilot's diverting his attention. - [NTSB SEA90LA181](https://openairdocs.org/ntsb/SEA90LA181.md): Cessna U206 · Lewistown, MT · Accident · No injuries · Limited investigation · Final report · Sep 6, 1990 · N2107F · Substantial damage > The pilot did not maintain an adequate lookout while maneuvering which resulted in a collision with a transmission wire. - [NTSB DEN90LA018](https://openairdocs.org/ntsb/DEN90LA018.md): Cessna U206B · Billings, MT · Accident · No injuries · Limited investigation · Final report · Nov 7, 1989 · N3481L · Substantial damage > Improper planning/decision by the pilot while taxiing during unfavorable wind conditions. - [NTSB DEN88LA188](https://openairdocs.org/ntsb/DEN88LA188.md): Cessna T210F · Ennis, MT · Accident · No injuries · Limited investigation · Final report · Aug 19, 1988 · N6132R · Substantial damage > While on a landing rollout, the left main gear strut failed & separated from the acft. The plt said he held the acft straight for about 600 ft, then it veered to the left & went off the rwy. Subsequently, the left wing & left horizontal stabilizer were… - [NTSB DEN88LA124](https://openairdocs.org/ntsb/DEN88LA124.md): Cessna A-185F · Phillipsburg, MT · Accident · No injuries · Limited investigation · Final report · Jun 4, 1988 · N94237 · Substantial damage - [NTSB DEN87LA119](https://openairdocs.org/ntsb/DEN87LA119.md): Cessna A188B · St. Ignatius, MT · Accident · No injuries · Limited investigation · Final report · May 6, 1987 · N9282R · Substantial damage > An ag plt was spraying a field near the local arpt, at 100 feet AGL. During an aerial application maneuver, the engine made a loud bang and stopped. The plt leveled the acft, selected a landing site and landed. During the roll out, the acft crossed an… - [NTSB DEN86LA050](https://openairdocs.org/ntsb/DEN86LA050.md): Beech V-35B · Wibaux, MT · Accident · Serious injuries · Limited investigation · Final report · Dec 18, 1985 · N24198 · Destroyed > The plt stated that light snow was falling at the arpt at the time of departure. The pax stated after the accident that the plt encountered clouds at their cruise alt of about 6000 ft. he continued to state that the acft made a shallow descent at first… - [NTSB DEN86LA046](https://openairdocs.org/ntsb/DEN86LA046.md): Cessna 206 · Hardin, MT · Accident · No injuries · Limited investigation · Final report · Dec 14, 1985 · N5173U · Destroyed > After ldg to the east on a snow covered dirt rwy, the pilot elected to t/o on an intersecting rwy to the south. He could not see the entire rwy surface from the position due to dwn slope from center of rwy. The acft impacted snowdrifts 40-50 mph on t/o gnd… - [NTSB DEN85LA149](https://openairdocs.org/ntsb/DEN85LA149.md): Beech V35B · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Jun 5, 1985 · N908V · Substantial damage > N904V, a privately owned B-35, skidded off to the side of a runway during landing. The plt said that he inadvertently activated the gear up switch instead of the flap switch. The right landing gear collapsed causing the plt to lose control of acft. - [NTSB DEN84LA229](https://openairdocs.org/ntsb/DEN84LA229.md): Cessna T-206 · Kalispell, MT · Accident · No injuries · Limited investigation · Final report · Jun 16, 1984 · N3985G · Substantial damage > The pilot reported complete power loss while turning final. Attempts to restore pwr were unsuccessful and the aircraft was landed hard in the grass short of rwy. Investigation failed to reveal evidence of engine malfunction or failure. - [NTSB DEN84LA164](https://openairdocs.org/ntsb/DEN84LA164.md): Cessna 210E · Livingston, MT · Accident · No injuries · Limited investigation · Final report · May 25, 1984 · N2373F · Substantial damage > While on a visual flight plan flight the non-instrument rated plt operated his unpressurized Cessna 210 above the clouds and up to an altitude of 16500 feet MSL. The plt stated that just after passing, 'crazy peak', he encountered extreme turbulence and the… - [NTSB DEN84LA118](https://openairdocs.org/ntsb/DEN84LA118.md): Cessna A188B · Hardin, MT · Accident · No injuries · Limited investigation · Final report · Mar 28, 1984 · N92593 · Substantial damage > The plt returned to the arpt with about a 100 gal load of spray solution on board when the flagger would not work. During the landing, the acft swerved to the left & the right gear collapsed. No mechanical malfunction or failure of the gear or brakes was… - [NTSB DEN82FTI17](https://openairdocs.org/ntsb/DEN82FTI17.md): Bellanca 17-30A · Browning, MT · Accident · No injuries · Final report · Aug 24, 1982 · N14695 · Substantial damage > Acft landed with the gear up. - [NTSB DEN82AA115](https://openairdocs.org/ntsb/DEN82AA115.md): Beech V35B · Near Ringling, MT · Accident · 6 fatal · Final report · Jun 24, 1982 · N4538S · Destroyed > Although IMC existed over mountainous areas, the plt attempted a visual flt direct to salt lake city. The probable flt path of the acft was one which is usually flown by plts on VFR flts. The course taken by plts desiring to cross over themountain ridges west… - [NTSB DEN82FTI07](https://openairdocs.org/ntsb/DEN82FTI07.md): Beech 35-C33 · Dillion, MT · Accident · No injuries · Closed · Nov 10, 1981 · N5649S · Substantial damage - [NTSB DEN81FTA05](https://openairdocs.org/ntsb/DEN81FTA05.md): Cessna 210 · Billings, MT · Accident · No injuries · Closed · Feb 5, 1981 · N3964Y · Substantial damage - [NTSB DEN81FTA02](https://openairdocs.org/ntsb/DEN81FTA02.md): Beech V35B · Billings, MT · Accident · No injuries · Closed · Nov 24, 1980 · N9007V · Substantial damage - [NTSB DEN80FTI07](https://openairdocs.org/ntsb/DEN80FTI07.md): Cessna 188B · Havre, MT · Accident · No injuries · Closed · May 17, 1980 · N9172G · Substantial damage - [NTSB SEA79DTI10](https://openairdocs.org/ntsb/SEA79DTI10.md): Cessna 188 · Carter, MT · Accident · No injuries · Closed · Mar 21, 1979 · N21759 · Substantial damage Next page: https://openairdocs.org/ntsb.md?engine=17032&state=MT&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."eventStateOrRegion" = 'MT' 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 ('17032')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=17032&state=MT --- 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.