NTSB investigations: Continental IO-520 series, CO
118 cases on aircraft whose registry engine model is Continental IO-520 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
| 1965 | 1 |
|---|---|
| 1966 | 1 |
| 1967 | 3 |
| 1968 | 3 |
| 1969 | 1 |
| 1970 | 2 |
| 1972 | 3 |
| 1973 | 3 |
| 1974 | 5 |
| 1975 | 4 |
| 1976 | 4 |
| 1977 | 5 |
| 1978 | 4 |
| 1979 | 4 |
| 1980 | 1 |
| 1981 | 3 |
| 1982 | 1 |
| 1983 | 1 |
| 1984 | 5 |
| 1985 | 1 |
| 1986 | 1 |
| 1987 | 4 |
| 1988 | 5 |
| 1989 | 2 |
| 1990 | 3 |
| 1991 | 1 |
| 1992 | 6 |
| 1993 | 1 |
| 1994 | 1 |
| 1995 | 2 |
| 1997 | 3 |
| 1998 | 1 |
| 1999 | 1 |
| 2002 | 3 |
| 2003 | 4 |
| 2004 | 5 |
| 2005 | 3 |
| 2006 | 2 |
| 2007 | 1 |
| 2008 | 2 |
| 2009 | 1 |
| 2014 | 1 |
| 2015 | 2 |
| 2017 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2024 | 2 |
| 2025 | 1 |
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.\"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 ('17032'))
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."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 ('17032'))
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 CEN25LA126Accident · No injuriesClass 3 · LimitedPreliminary reportBeech V35 · Engelwood, COOn March 16, 2025, at 1741 mountain daylight time, a Beech V35 airplane, N7987R, was substantially damaged when it was involved in an accident near Englewood, Colorado. The pilot was not injured. The airplane was operated as a Title 14 Code of Federal…NTSB CEN24LA321Accident · No injuriesClass 4 · LimitedFinal reportCessna A185 · Loveland, COThe pilot’s failure to maintain directional control during the landing, that resulted in a ground loop and a runway excursion. Contributing to the accident was the flight instructor’s delayed remedial action.NTSB CEN24LA227Accident · Minor injuriesClass 4 · LimitedFinal reportBeech D55 · Colorado Springs, COThe deflated right main landing gear tire due to a sidewall puncture made by an unknown object, which led to the pilot’s loss of directional control and the landing gear collapse during landing roll.NTSB CEN21LA152Accident · No injuriesClass 4 · LimitedFinal reportCessna A185F · Pueblo, COThe pilot’s failure to maintain directional control in gusting crosswind conditions.NTSB CEN21FA007Accident · 2 fatalClass 3 · FieldFinal reportBeech S35 · Telluride, COThe pilot’s loss of control during the climb to cruise flight resulting in the airplane’s impact with terrain. Contributing to the accident was the pilot’s decision to not climb to a higher altitude before proceeding over high terrain.NTSB GAA20CA084Accident · No injuriesData collectionFinal reportBeech 55 · Broomfield, COThe pilot's unintentional retraction of the landing gear during the landing roll.NTSB CEN17LA220Accident · Serious injuriesLimited investigationFinal reportBellanca 17 30 · Watkins, COThe pilot's in-flight fuel mismanagement, which resulted in fuel starvation and a total loss of engine power.NTSB CEN17LA091Accident · No injuriesLimited investigationFinal reportBeech 95-C55 · Delta, COThe failure of the landing gear to extend during landing approach due to the interference between the landing gear motor's sector and worm gears.NTSB CEN15FA424Accident · 2 fatalField investigationFinal reportBeech S35 · Pagosa Springs, COImproper engine assembly by unknown maintenance personnel, which resulted in the failure of the No. 6 connecting rod due to oil starvation from the shifting of the crankshaft's No. 4 main bearing.NTSB CEN15LA144Accident · No injuriesLimited investigationFinal reportBeech 58 · Denver, COThe pilot’s failure to maintain airplane control during a rejected takeoff from a slush-covered runway at night.NTSB CEN14LA393Accident · Serious injuriesLimited investigationFinal reportBeech 35-C33A · Pueblo, COA total loss of engine power due to fuel starvation, which resulted from the pilot’s improper fuel management and resulted in a forced landing on unsuitable terrain.NTSB CEN10LA056Accident · Minor injuriesLimited investigationFinal reportNavion Navion G · Montrose, COA loss of engine power due to the pilot’s inadequate preflight planning.NTSB DEN08LA128Accident · No injuriesLimited investigationFinal reportBeech 35-C33A · Longmont, COA total loss of engine power for reasons undetermined. Contributing to the accident was the unsuitable terrain on which to make a forced landing.NTSB DFW08CA085Accident · Minor injuriesData collectionFinal reportCessna 206 · Peyton, COThe loss of engine power due to fuel exhaustion as a result of the pilot's inadequate preflight planning.NTSB DEN07LA124Accident · No injuriesLimited investigationFinal reportCessna A185F · Englewood, COThis case was revised 10/31/2007. Low compression in number 2 cylinder, which reduced the airplane's climb capability. Contributing factors in this accident were the high density altitude conditions, and the tree.NTSB DEN07CA015Accident · No injuriesData collectionFinal reportCessna T210G · Delta, COthe pilot's failure to maintain aircraft control and a proper descent rate during the landing.NTSB DEN07FA002Accident · Minor injuriesField investigationFinal reportBeech 36 · Centennial, COthe loss of engine power for undetermined reasons. Contributing factors were the light pole and parked vehicles impacted during the forced landing.NTSB DEN05LA088Accident · No injuriesLimited investigationFinal reportBeech S35 · Colorado Spring, COthe flight instructor and pilot's improper decision to continue the attempted high altitude takeoff when Vy airspeed was not obtained, and failure to abort the takeoff which resulted in an off-field landing and subsequent impact with terrain. A contributing…NTSB DEN05LA086Accident · Minor injuriesLimited investigationFinal reportBeech S35 · Broomfield, COthe pilot's failure to maintain adequate airspeed which resulted in a stall, and his failure to abort the takeoff. The loss of power for undetermined reasons is a contributing factor.NTSB DEN05FA047Accident · 1 fatalField investigationFinal reportBeech E55 · Fort Collins, COthe pilot's failure to maintain aircraft control. Contributing factors were the left engine loss of power for reasons undetermined, and the pilot allowing the airspeed to drop below Vmc during an attempted single-engine go-around.NTSB DEN05LA008Accident · No injuriesLimited investigationFinal reportCessna 210M · Salida, COThe pilot's inadequate preflight planning which failed to determine the fuel supply was inadequate resulting in fuel exhaustion and the loss of engine power.NTSB DEN04LA118Accident · No injuriesLimited investigationFinal reportBeech V35A · Grand Junction, COthe pilot's improper planning and decision making resulting in the loss of engine power due to fuel starvation. Contributing factors include the insufficient time to completely extend the landing gear, and the lack of suitable terrain for a forced landing.NTSB DEN04CA080Accident · No injuriesData collectionFinal reportCessna T188C · Lamar, COA partial loss of engine power for undetermined reasons and the pilot's failure to maintain adequate airspeed which resulted in a stall. Contributing to the accident was the low altitude.NTSB DEN04LA071Accident · Serious injuriesLimited investigationFinal reportCessna A185E · Englewood, COthe pilot's inadequate preflight planning which failed to verify an adequate fuel supply and his inadequate in-flight planning/decision which resulted in fuel exhaustion. The inadequate indication of his fuel quantity system is a contributing factor.NTSB DEN04LA075Accident · No injuriesLimited investigationFinal reportBeech 95-C55 · Rifle, COthe pilot's failure to verify the manual extension of the landing gear resulting in an inadvertent wheels up landing. Contributing factors include the electrical systems failure for undetermined reasons, the pilot's diverted attention and the pilot's improper…NTSB DEN04LA013Accident · No injuriesLimited investigationFinal reportCessna 210G · Meeker, COthe pilot's failure to extend the landing gear. Contributing to the accident was the pilots failure to recognize the gear warning horn during the landing flare.NTSB DEN03LA118Accident · Minor injuriesLimited investigationFinal reportCessna 210K · Durango, COthe pilot's improper in-flight planning/decision and his failure to maintain aircraft control. Factors contributing to the accident were the high altitude on base turn and final approach, the low airspeed, the pilot's improper use of flaps, the inadvertent…NTSB DEN03LA107Accident · No injuriesLimited investigationFinal reportBeech S35 · Colorado Spring, COthe pilot's inadequate in-flight planning/decision in which he mismanaged his fuel supply by failing to switch tanks resulting in fuel starvation and the loss of engine power. A contributing factor was the pilot's diverted attention.NTSB DEN03FA059Accident · 4 fatalField investigationFinal reportCessna A185F · Grand Junction, COthe pilot's poor judgment and his failure to maintain aircraft control. Contributing factors were the high winds and downdrafts, and the pilot's self-induced pressure to go home.NTSB DEN03LA029Accident · No injuriesLimited investigationFinal reportBeech F33A · Durango, COthe pilot's failure to extend the landing gear. A contributing factor is the pilot's failure to follow the checklist.NTSB DEN02GA102Accident · 1 fatalFinal reportCessna A185F · Howard, COthe pilot's failure to maintain clearance of the terrain. Contributing factors were the clear air turbulent weather condition, and the high density altitude condition.NTSB DEN02LA041Accident · No injuriesLimited investigationFinal reportCessna A185E · Greeley, COthe inadvertent ground loop during landing roll. A contributing factor was the partial brake system failure.NTSB DEN99FA093Accident · 1 fatalField investigationFinal reportBeech V35A · Nederland, COThe pilot's intentional and continued flight into instrument meteorological conditions. Factors were his failure to obtain a weather briefing, the existing weather conditions that included snow, hail, obscuration and lightning, and the mountainous terrain.NTSB FTW98LA324Accident · No injuriesLimited investigationFinal reportCessna A188B · Erie, COThe pilot's failure to maintain directional control of the airplane. A factor was a crosswind gust.NTSB FTW98LA066Accident · Minor injuriesLimited investigationFinal reportCessna 207 · Fruita, COThe total loss of engine power for undetermined reasons .NTSB FTW97LA338Accident · No injuriesLimited investigationFinal reportBeech V35B · Saguache, CO**This report was modified on 2/23/2016. Please see the public docket for this accident for additional information.** the loss of engine power during cruise for undetermined reasons and the unsuitable terrain encountered by the pilot during the forced…NTSB FTW97LA297Accident · Serious injuriesLimited investigationFinal reportBeech F33A · Creede, COThe pilot's intentional low altitude flight over mountainous terrain, inadequate altitude to clear surrounding obstacles, and his misjudging vertical clearance. A factor was the pilot's use of an inappropriate chart for navigation.NTSB FTW96LA082Accident · No injuriesLimited investigationFinal reportBellanca 17-30 · Durango, COthe failure of the nose wheel steering mechanism which rendered the aircraft uncontrollable on the ground. A factor was the rough and uneven terrain.NTSB FTW95LA353Accident · No injuriesLimited investigationFinal reportBeech 35N · Creede, COFailure by the pilot to follow the checklist and lower the landing gear.NTSB FTW95LA073Accident · Minor injuriesLimited investigationFinal reportCessna A185F · Erie, COThe pilot's failure to maintain airspeed resulting in the inadvertent stall.NTSB FTW94LA040Accident · No injuriesLimited investigationFinal reportCessna A185F · Maybell, COThe pilot's failure to ascertain the condition of the landing area. The snow covered condition of the runway was a factor.NTSB DEN93LA020Accident · No injuriesLimited investigationFinal reportBeech 58 · Ft Collins, COFailure by the pilot to follow IFR procedures in not executing a missed approach when he arrived at the runway threshold with improper alignment and improper descent rate for landing. A factor was: marginal weather conditions.NTSB DEN93LA006Accident · No injuriesLimited investigationFinal reportBellanca 17-30A · Grand Junction, COFatigue failure of the nose landing gear upper drag strut bracket due to fatigue cracking.NTSB DEN93LA001Accident · Minor injuriesLimited investigationFinal reportBeech F33A · Steamboat Sprgs, COThe pilot's selection of an unsuitable landing area when a suitable forced landing area was available. A factor was: fuel starvation for unknown reasons.NTSB DEN92LA090Accident · No injuriesLimited investigationFinal reportCessna A188 · Burlington, COFractured connecting rod. A factor was: the lack of suitable terrain for the forced landing.NTSB DEN92FA081Accident · No injuriesField investigationFinal reportCessna 402A · Holyoke, COFailure of the pilot to feather the failed engine propeller. A factor was: power loss for undetermined reasons.NTSB DEN92LA054Accident · No injuriesLimited investigationFinal reportCessna T210H · Boulder, COPower loss due to low fuel pump pressure and a chafed upper deck reference line. A factor was: the pilot's inability to maintain directional control due to a partially extended main landing gear.NTSB DEN91LA050Accident · No injuriesLimited investigationFinal reportBeech V35B · Englewood, COThe pilot's premature liftoff and inadvertent stall mush. Factors were: downdrafts, high density altitude, and unsuitable terrain.NTSB DEN90DTE05Accident · No injuriesFinal reportCessna 188B · Eckley, COA failure on the part of the pilot in command to maintain adequate terrain clearance.NTSB DEN90LA134Accident · No injuriesLimited investigationFinal reportCessna A185F · Erie, COFailure of the pilot receiving instruction to choose suitable terrain for the landing. Contributing to the accident was the cfi's inadequate supervision.