# NTSB investigations: Continental I0-470 series, CO 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 · 90 cases ## Latest cases - [NTSB ANC26LA060](https://openairdocs.org/ntsb/ANC26LA060.md): Beech E33 · Steamboat Springs, CO · Accident · No injuries · Class 4 · Limited · Investigation open · Jun 13, 2026 · N8475N · Substantial damage - [NTSB CEN25FA178](https://openairdocs.org/ntsb/CEN25FA178.md): Beech 95-B55 (T42A) · Broomfield, CO · Accident · 2 fatal · Class 3 · Field · Preliminary report · May 17, 2025 · N4321Z · Destroyed > On May 17, 2025, about 1003 mountain daylight time, a Beechcraft 95-B55, was destroyed when it was involved in an accident near Broomfield, Colorado. The pilot and pilot-rated passenger sustained fatal injuries. The flight was being operated as a Title 14… - [NTSB CEN25FA040](https://openairdocs.org/ntsb/CEN25FA040.md): Beech 35-B33 · Nunn, CO · Accident · 1 fatal · Class 3 · Field · Preliminary report · Nov 15, 2024 · N285BW · Destroyed > On November 15, 2024, about 1000 mountain standard time (MST), a Beech 35-B33, N285BW, was destroyed when it was involved in an accident near Nunn, Colorado. The pilot was fatally injured. The airplane was operated as a Title 14 Code of Federal Regulations… - [NTSB CEN24LA018](https://openairdocs.org/ntsb/CEN24LA018.md): Cessna 210B · Pueblo, CO · Accident · No injuries · Class 3 · Limited · Final report · Oct 18, 2023 · N9597X · Substantial damage > The fatigue failure of the right main landing gear hydraulic actuator, which resulted in a loss of hydraulic fluid that prevented the pilot from lowering the landing gear to the fully extended position. - [NTSB CEN23LA407](https://openairdocs.org/ntsb/CEN23LA407.md): Beech 95-B55 (T42A) · Greeley, CO · Accident · No injuries · Class 3 · Limited · Final report · Aug 30, 2023 · N2KM · Substantial damage > The pilot’s failure to extend the landing gear. Contributing to the accident was a malfunction of the landing gear warning horn for undetermined reasons. - [NTSB CEN23LA049](https://openairdocs.org/ntsb/CEN23LA049.md): Cessna 182A · Durango, CO · Accident · No injuries · Class 3 · Limited · Final report · Nov 24, 2022 · N3886D · Substantial damage > A complete loss of engine power for reasons that could not be determined from the available evidence. - [NTSB CEN21LA325](https://openairdocs.org/ntsb/CEN21LA325.md): Beech 35-C33 · Longmont, CO · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 18, 2021 · N18AR · Substantial damage > The airplane’s lack of climb performance after takeoff in high density altitude conditions for reasons that could not be determined based on the available evidence. - [NTSB CEN21LA289](https://openairdocs.org/ntsb/CEN21LA289.md): Beech H35 · Watkins, CO · Accident · No injuries · Class 4 · Limited · Final report · Jun 22, 2021 · N5596D · Substantial damage > The pilot’s failure to maintain directional control during the landing roll, which resulted in a runway excursion and a subsequent impact with an obstacle. - [NTSB CEN21LA001](https://openairdocs.org/ntsb/CEN21LA001.md): Cessna 210 · Cedaredge, CO · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 4, 2020 · N9568X · Destroyed > A partial loss of engine power for reasons that could not be determined based on available evidence. - [NTSB CEN18LA076](https://openairdocs.org/ntsb/CEN18LA076.md): Beech K35 · Longmont, CO · Accident · Serious injuries · Limited investigation · Final report · Jan 13, 2018 · N803R · Substantial damage > A total loss of engine power for reasons that could not be determined because a postaccident examination of the airplane revealed no evidence of mechanical malfunctions or failures that would have precluded normal operation. - [NTSB CEN17LA340](https://openairdocs.org/ntsb/CEN17LA340.md): Cessna 310G · Broomfield, CO · Accident · No injuries · Limited investigation · Final report · Sep 1, 2017 · N8957Z · Substantial damage > A collapse of the right main landing gear due to a bent pushrod, which precluded the gear from fully extending. The reason for the bent pushrod could not be determined based on the available information. - [NTSB CEN17LA162](https://openairdocs.org/ntsb/CEN17LA162.md): Cessna 210 · Salida, CO · Accident · No injuries · Limited investigation · Final report · Apr 20, 2017 · N9589T · Substantial damage > The pilot’s inadequate fuel management, which resulted in a total loss of engine power due to fuel starvation. - [NTSB CEN15FA400](https://openairdocs.org/ntsb/CEN15FA400.md): Cessna 310H · Silverton, CO · Accident · 4 fatal · Field investigation · Final report · Sep 5, 2015 · N1099Q · Destroyed > The noninstrument-rated pilot's improper judgment and his failure to maintain situational awareness, which resulted in the flight's encounter with instrument meteorological conditions and controlled flight into terrain during cruise flight. - [NTSB CEN14FA141](https://openairdocs.org/ntsb/CEN14FA141.md): Beech 35/33 · Telluride, CO · Accident · 3 fatal · Field investigation · Final report · Feb 16, 2014 · N400DJ · Substantial damage > The airplane’s failure to obtain a positive climb rate, which resulted in controlled flight into terrain. Contributing to the accident was the pilot’s inadequate preflight planning. - [NTSB CEN14CA125](https://openairdocs.org/ntsb/CEN14CA125.md): Cessna 310I · Aurora, CO · Accident · No injuries · Data collection · Final report · Jan 28, 2014 · N8133M · Substantial damage > Loss of engine power due to fuel exhaustion and the pilot's inadequate preflight inspection. - [NTSB CEN12LA675](https://openairdocs.org/ntsb/CEN12LA675.md): Beech E33 · Greeley, CO · Accident · No injuries · Limited investigation · Final report · Sep 26, 2012 · N7133N · Substantial damage > The loss of engine power for reasons that could not be determined during postaccident examinations and testing. - [NTSB CEN12LA252](https://openairdocs.org/ntsb/CEN12LA252.md): Beech P35 · Englewood, CO · Accident · Minor injuries · Limited investigation · Final report · Apr 22, 2012 · N8518M · Substantial damage > The pilot’s failure to abort the takeoff after the airplane failed to gain adequate airspeed. - [NTSB CEN11FA130](https://openairdocs.org/ntsb/CEN11FA130.md): Cessna 210B · Loveland, CO · Accident · 1 fatal · Field investigation · Final report · Dec 27, 2010 · N200EP · Substantial damage > The pilot's intentional flight into terrain. - [NTSB CEN10FA493](https://openairdocs.org/ntsb/CEN10FA493.md): Cessna 310C · Calhan, CO · Accident · 2 fatal · Field investigation · Final report · Aug 23, 2010 · N896H · Substantial damage > The pilots'failure to maintain control of the airplane which resulted in an inadvertent stall and spin. - [NTSB CEN10LA032](https://openairdocs.org/ntsb/CEN10LA032.md): Cessna 210 · Walsh, CO · Accident · Minor injuries · Limited investigation · Final report · Oct 27, 2009 · N7464E · Substantial damage > A partial loss of engine power due to failure of the No. 2 cylinder as a result of the failure of the repair facility to properly torque the lower four nuts on the cylinder. - [NTSB DEN08LA153](https://openairdocs.org/ntsb/DEN08LA153.md): Cessna 210 · Pagosa Springs, CO · Accident · No injuries · Limited investigation · Final report · Sep 7, 2008 · N6515X · Substantial damage > The failure of the landing gear to extend for undetermined reasons. - [NTSB DFW08FA153](https://openairdocs.org/ntsb/DFW08FA153.md): Cessna 310Q · Steamboat, CO · Accident · 2 fatal · Field investigation · Final report · May 25, 2008 · N8187Q · Destroyed > The pilot's failure to maintain clearance from mountainous terrain in day visual conditions. Contributing to the accident was the pilot's impairment due to marijuana and inadequate medical oversight of the pilot by the Federal Aviation Administration. - [NTSB DEN08LA014](https://openairdocs.org/ntsb/DEN08LA014.md): Cessna 210 · Canon City, CO · Accident · No injuries · Limited investigation · Final report · Oct 17, 2007 · N215MD · Substantial damage > The failure of the engine throttle cable resulting in a lack of engine power when commanded. - [NTSB DEN06FA132](https://openairdocs.org/ntsb/DEN06FA132.md): Beech 35-C33 · Telluride, CO · Accident · 4 fatal · Field investigation · Final report · Sep 15, 2006 · N5893J · Destroyed > The pilot's inadvertent flight into mountain wave turbulence resulting in the airplane's loss of control and subsequent impact into mountainous terrain. Factors contributing to the accident were the mountain wave turbulence and high winds. - [NTSB DEN05LA117](https://openairdocs.org/ntsb/DEN05LA117.md): Bellanca 14-19-3 · Grand Junction, CO · Accident · 1 fatal · Limited investigation · Final report · Jul 30, 2005 · N8870R · Substantial damage > A loss of engine power due to fuel starvation as a result of the improper fuel selector position. Factors contributing to the accident were the inadvertent stall, the ravine, and the steep drop off embankment. - [NTSB DEN04LA113](https://openairdocs.org/ntsb/DEN04LA113.md): Bellanca 14-19-3A · Estes Park, CO · Accident · No injuries · Limited investigation · Final report · Jul 31, 2004 · N1251R · Substantial damage > the loss of engine power for undetermined reasons resulting in a forced landing. Factors contributing to the accident were the unsuitable terrain for landing and the mailbox posts. - [NTSB DEN02LA068](https://openairdocs.org/ntsb/DEN02LA068.md): Beech K35 · Montrose, CO · Accident · No injuries · Limited investigation · Final report · Jun 26, 2002 · N9518R · Substantial damage > The pilot's failure to follow published aircraft operating procedures, which resulted in a loss of engine power due to fuel starvation. A contributing factor was the lack of suitable terrain for a forced landing. - [NTSB DEN02FA050](https://openairdocs.org/ntsb/DEN02FA050.md): Beech M35 · Briggsdale, CO · Accident · 1 fatal · Field investigation · Final report · Jun 7, 2002 · N9775R · Destroyed > controlled descent into terrain for reasons undetermined. - [NTSB DEN01LA124](https://openairdocs.org/ntsb/DEN01LA124.md): Beech 95-B55 (T42A) · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Jul 17, 2001 · N886N · Destroyed > the pilot receiving instruction inadvertently retracting the landing gear during the landing roll. A contributing factor was the flight instructor's inadequate supervision of the pilot receiving instruction. - [NTSB DEN01LA022](https://openairdocs.org/ntsb/DEN01LA022.md): Cessna 210C · Boulder, CO · Accident · No injuries · Limited investigation · Final report · Dec 13, 2000 · N969RJ · Substantial damage > Total loss of engine power due to fuel contamination (water), and failure of the pilot to have the airplane completely refueled. A factor was unsuitable terrain on which to make a forced landing. - [NTSB DEN00LA116](https://openairdocs.org/ntsb/DEN00LA116.md): Cessna 310C · Erie, CO · Accident · No injuries · Limited investigation · Final report · Jun 24, 2000 · N1779H · Substantial damage > A sudden and unexpected encounter with a downdraft while on final approach. A factor was the transmission wire. - [NTSB DEN00LA029](https://openairdocs.org/ntsb/DEN00LA029.md): Beech N-35 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Dec 16, 1999 · N9468Y · Substantial damage > A forced landing on unsuitable terrain due a complete loss of power. A factor was the pilot inadvertently placing the fuel selector to the off position while executing the approach for landing checklist. - [NTSB DEN99LA045](https://openairdocs.org/ntsb/DEN99LA045.md): Cessna 185 · Durango, CO · Accident · No injuries · Limited investigation · Final report · Mar 1, 1999 · N9823X · Substantial damage > The pilot's failure to maintain directional control and inadvertently allowing the airplane to ground loop. Factors were gusty crosswind conditions, pertinent crosswind information not made available by the manufacturer, and FAA's inadequate certification and… - [NTSB DEN99LA043](https://openairdocs.org/ntsb/DEN99LA043.md): Beech 35-C33 · Leadville, CO · Accident · No injuries · Limited investigation · Final report · Feb 28, 1999 · N977MC · Substantial damage > The pilot's in-flight decision to turn into rising terrain, and his decision to fly into and out of the airport in a heavy weight condition after the local flight instructor/FAA accident prevention counselor recommended that he should not. Factors were the… - [NTSB FTW97LA239](https://openairdocs.org/ntsb/FTW97LA239.md): Cessna 210 · Peyton, CO · Accident · No injuries · Limited investigation · Final report · Jun 27, 1997 · N9417T · Substantial damage > Failure of both pilots to assure the landing gear was down and locked. - [NTSB FTW97LA071](https://openairdocs.org/ntsb/FTW97LA071.md): Cessna 210A · Peyton, CO · Accident · No injuries · Limited investigation · Final report · Dec 23, 1996 · N6680X · Substantial damage > the pilot's improper fuel management by failing to avoid a prolong uncoordinated turn or slip, which resulted in fuel starvation. Factors relating to the accident were: darkness, and the lack of (activated) runway lights. - [NTSB FTW96LA334](https://openairdocs.org/ntsb/FTW96LA334.md): Cessna 210 · Pueblo, CO · Accident · No injuries · Limited investigation · Final report · Aug 3, 1996 · N414N · Substantial damage > improper routing of the nose landing gear hydraulic line by unknown maintenance personnel, allowing it to chafe on the nose wheel and develop a leak, which resulted in an inability to obtain a down-and-locked condition of the landing gear. - [NTSB FTW96LA051](https://openairdocs.org/ntsb/FTW96LA051.md): Cessna 310J · Englewood, CO · Accident · Minor injuries · Limited investigation · Final report · Nov 24, 1995 · N1147M · Substantial damage > failure of the pilot to feather the propeller on the inoperative engine in accordance with the emergency procedure. Factors relating to the accident were: loss of power in the left engine for undetermined reason(s), and rough/uneven terrain in the emergency… - [NTSB FTW96LA047](https://openairdocs.org/ntsb/FTW96LA047.md): Cessna 210B · Loveland, CO · Accident · No injuries · Limited investigation · Final report · Nov 11, 1995 · N9651X · Substantial damage > Failure of the pilot to extend the landing gear. - [NTSB FTW95LA340](https://openairdocs.org/ntsb/FTW95LA340.md): Beech J35 · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Aug 14, 1995 · N8344D · Substantial damage > Inadvertent activation of the fuel boost pump by either the pilot (who was being instructed) or by the flight instructor (CFI). Factors relating to the accident were: the briefing of improper leaning procedures by the CFI, location of the boost pump switch… - [NTSB FTW94FA104](https://openairdocs.org/ntsb/FTW94FA104.md): Beech 95-B55B · Battlement Mesa, CO · Accident · 1 fatal · Field investigation · Final report · Mar 15, 1994 · N9HC · Destroyed > Impaired judgement and performance of the pilot by flying while under the influence of alcohol that resulted in his failure to maintain clearance (or altitude) from terrain, while flying at night. - [NTSB FTW94LA029](https://openairdocs.org/ntsb/FTW94LA029.md): Cessna 210 · Monte Vista, CO · Accident · No injuries · Limited investigation · Final report · Oct 22, 1993 · N9653T · Substantial damage > Failure by the pilot in command to follow procedures and directives to lower the landing gear prior to landing. - [NTSB DEN93FA066](https://openairdocs.org/ntsb/DEN93FA066.md): Cessna 310J · Broomfield, CO · Accident · Minor injuries · Field investigation · Final report · Jun 5, 1993 · N3005L · Destroyed > Friction of escaping oxygen under high pressure igniting a lubricant in the nosewheel well area, and improper aircraft servicing by maintenance personnel. - [NTSB DEN93LA023](https://openairdocs.org/ntsb/DEN93LA023.md): Cessna 310L · Greeley, CO · Accident · No injuries · Limited investigation · Final report · Jan 23, 1993 · N3303X · Substantial damage > Poor in flight planning and decision making by the flight instructor in allowing the student to progress to a point where a safe flight regimen could not be maintained. A factor was: the dual students failure to maintain control of the aircraft. - [NTSB DEN93LA010](https://openairdocs.org/ntsb/DEN93LA010.md): Cessna 310Q · Englewood, CO · Accident · No injuries · Limited investigation · Final report · Nov 16, 1992 · N999HD · Substantial damage > Undetermined. - [NTSB DEN92LA058](https://openairdocs.org/ntsb/DEN92LA058.md): Cessna 185 · Durango, CO · Accident · No injuries · Limited investigation · Final report · Jun 13, 1992 · N9823X · Substantial damage > Improper use of brakes. Factors were: poorly planned approach and excessive landing speed. - [NTSB DEN92IA046](https://openairdocs.org/ntsb/DEN92IA046.md): Cessna 310-L · Hugo, CO · Incident · No injuries · Incident investigation · Final report · Apr 12, 1992 · N331BX · No damage > Failure of the left voltage regulator. Factors were: failure of the pilot/mechanic to properly maintain the aircraft, and failure of the right alternator circuit breaker. - [NTSB DEN92LA039](https://openairdocs.org/ntsb/DEN92LA039.md): Beech 55 · Longmont, CO · Accident · No injuries · Limited investigation · Final report · Mar 2, 1992 · N155BB · Substantial damage > The student pilot's failure to maintain directional control and the flight instructor's inadequate supervision. - [NTSB DEN91LA041](https://openairdocs.org/ntsb/DEN91LA041.md): Beech P-35 · Durango, CO · Accident · Minor injuries · Limited investigation · Final report · Feb 10, 1991 · N9653Y · Substantial damage > Engine failure due to oil starvation caused by turbocharger oil feed line failure and subsequent loss of lubricating oil to the engine. - [NTSB DEN91IA019](https://openairdocs.org/ntsb/DEN91IA019.md): Beech J-35 · Brighton, CO · Incident · No injuries · Incident investigation · Final report · Nov 18, 1990 · N8263D · Minor damage > The failure of the engine fuel feed line resulting in a complete loss of power. Contributing to the incident was improper installation of the fuel feed transducer. Next page: https://openairdocs.org/ntsb.md?engine=17027&state=CO&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" = 'CO' 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 ('17027')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=17027&state=CO --- 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.