NTSB investigations: Continental IO-520 series
31 cases on aircraft whose registry engine model is Continental IO-520 series, where the defining event was Landing gear collapse. 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
| 2008 | 3 |
|---|---|
| 2009 | 1 |
| 2010 | 2 |
| 2011 | 3 |
| 2012 | 1 |
| 2013 | 3 |
| 2015 | 2 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
| 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 ('17032')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e.\"isDefiningEvent\" AND e.\"tier2Number\" = '094'))
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 ('17032')
AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '094'))
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 ANC26LA032Accident · No injuriesClass 3 · LimitedPreliminary reportCessna A185F · Aniak, AKOn April 24, 2026, about 1045 Alaska daylight time, a wheel/ski-equipped Cessna 185 airplane, N92DC, was substantially damaged in an accident at Aniak Airport (ANI), Aniak, Alaska. The pilot and one passenger were not injured. The flight was being operated as…NTSB ERA26LA173Accident · No injuriesClass 4 · LimitedFinal reportBeech 58 · Stevensville, MDThe pilot’s inadvertent retraction of the landing gear lever during the landing roll, which resulted in a gear collapse and runway excursion.NTSB ERA26LA117Accident · No injuriesClass 4 · LimitedFinal reportBeech V35 · Gulf Shores, ALThe pilot’s failure to establish a positive rate of climb before retracting the landing gear, which resulted in abnormal runway contact during the takeoff roll.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 ERA24LA376Accident · No injuriesClass 4 · LimitedFinal reportBeech 58 · Raleigh, NCDamage to the landing gear selector switch wire bundle which resulted in an inadvertent retraction of the landing gear during the takeoff roll.NTSB WPR23LA350Accident · No injuriesClass 3 · LimitedFinal reportCessna U206C · Challis, IDThe failure of the left main landing gear spring assembly due to a fatigue crack. Contributing to the accident was the improper maintenance on the landing gear spring assembly which allowed corrosion to develop.NTSB ERA23LA154Accident · No injuriesClass 3 · LimitedFinal reportCessna 310R · Lexington, KYA main landing gear collapse due to a landing gear actuator overtravel for reasons that could not be determined.NTSB WPR22LA124Accident · No injuriesClass 3 · LimitedFinal reportCessna 310R · McGrath, AKA failure of the right main landing gear bellcrank lower arm fork, bellcrank, pivot bolt, and trunnion bellcrank lug for undetermined reasons.NTSB ERA22LA005Accident · No injuriesClass 4 · LimitedFinal reportCessna 210 · Columbia, SCA failure of the landing gear hydraulic power pack for reasons that could not be determined.NTSB ERA21LA319Accident · No injuriesClass 4 · LimitedFinal reportBeech F33A · Oxford, CTThe inadvertent operation of the landing handle during the landing roll, which resulted in a nose gear retraction and subsequent collision with the runway.NTSB WPR20CA213Accident · No injuriesClass 4 · Data collectionFinal reportBeech 33 · Redmond, ORThe left seated flight instructor’s improper manipulation of the landing gear position selection lever to the up position while still on the landing roll, which ultimately resulted in a landing gear collapse during a subsequent landing.NTSB WPR20CA183Accident · No injuriesClass 4 · Data collectionFinal reportCessna 310 · Butte, MTThe 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 ERA19CA291Accident · No injuriesData collectionFinal reportBeech 55 · Sebring, FLThe passenger’s inadvertent retraction of the landing gear during the landing roll without being instructed to do so by the pilot.NTSB ERA19TA067Accident · No injuriesClass 3Final reportBeech A36 · Summerland Key, FLThe pilot’s inadvertent retraction of the landing gear during landing rollout, resulting in a landing gear collapse.NTSB ANC18LA043Accident · No injuriesClass 3 · LimitedFinal reportCessna 210 · Ramona, CAThe failure of the engine-driven hydraulic pump due to the installation of improper cap screws, which resulted in a gap in the pump housing, a subsequent hydraulic leak, and the landing gear collapsing.NTSB CEN18LA128Accident · No injuriesLimited investigationFinal reportCessna 310R · Kansas City, MOThe landing gear collapse due to the separation of the end fitting bolt for reasons that could not be determined based on the available evidence.NTSB WPR16LA015Accident · No injuriesLimited investigationFinal reportCessna 310J · Tucson, AZThe insufficient right main landing gear (MLG) down-lock tension due to maintenance personnel's failure to perform a rigging procedure during the airplane's most recent inspection, which resulted in the right MLG collapsing during landing.NTSB CEN15LA415Accident · No injuriesLimited investigationFinal reportBeech 58 · Gary, INThe pilot’s failure to ensure that the landing gear was down while on short final, his subsequent failure to conduct a go-around, and his loss of situational awareness of the airplane’s altitude above the runway while landing.NTSB ERA13LA398Accident · No injuriesLimited investigationFinal reportCessna 210J · Fort Myers, FLThe failure of the landing gear hydraulic power pack system to provide sufficient pressure to lock the main landing gear in the down position. Contributing to the accident was the improper maintenance and inspection of the landing gear system, the pilot’s…NTSB WPR13LA319Accident · No injuriesLimited investigationFinal reportCessna T210K · Phoenix, AZThe collapse of the left main landing gear due to a broken gear tooth in the landing gear actuator.NTSB ANC13CA038Accident · No injuriesData collectionFinal reportBeech A36 · Port Alsworth, AKThe failure of the left main landing gear retraction brace assembly, resulting in the collapse of the left main landing gear.NTSB CEN12LA456Accident · No injuriesLimited investigationFinal reportPiper PA-46-310P · Metropolis, ILLanding gear collapse for reasons that could not be determined because testing could not replicate the problem.NTSB WPR11CA468Accident · No injuriesData collectionFinal reportBeech 36 · Riverton, WYThe pilot's inadvertent retraction of the landing gear during the landing roll.NTSB ANC11CA018Accident · No injuriesData collectionFinal reportCessna A185F · Aniak, AKThe inadvertent contact with a rut in the snow while taxiing, resulting in the collapse of the right main landing gear.NTSB ERA11LA191Accident · No injuriesLimited investigationFinal reportCessna 414 · New York, NYThe improper rigging of the right main landing gear, which resulted in ovestress fractures of a bolt and aft lug on the trunnion assembly.NTSB WPR10LA347Accident · No injuriesLimited investigationFinal reportBeech E-55 · Las Vegas, NVThe landing gear collapse for undetermined reasons.NTSB WPR10LA140Accident · No injuriesLimited investigationFinal reportCessna 210L · Aurora, ORThe failure of the landing gear to properly function for undetermined reasons, resulting in the right main landing gear collapsing during landing. Contributing to the accident was the pilot's failure to follow the emergency gear extension procedure.NTSB CEN09CA356Accident · No injuriesData collectionFinal reportBeech A36 · Charleston, MOThe pilot's inadvertent use of the landing gear selector handle instead of the flap handle during landing rollout, which resulted in the collapse of the nose landing gear.NTSB MIA08LA185Accident · No injuriesLimited investigationFinal reportBellanca 17-30A · Sparta, TNFailure of the nose landing gear mount during a normal landing due to an improper weld.NTSB MIA08LA066Accident · No injuriesLimited investigationFinal reportCessna 210L · Tampa, FLThe malfunction of the right main landing gear down-and-locked switch.NTSB CHI08LA070Accident · No injuriesLimited investigationFinal reportBeech 58 · Cahokia, ILMaintenance personnel's improper replacement of the landing gear leg brace assembly which subsequently failed to keep the landing gear in the locked position.