# NTSB investigations: Continental TSIO-520 series: Landing gear collapse 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. ## Latest cases - [NTSB WPR26LA340](https://openairdocs.org/ntsb/WPR26LA340.md): Cessna P210N · San Luis Obispo, CA · Accident · No injuries · Class 3 · Limited · Preliminary report · Sep 13, 2026 · N4617W · Substantial damage > On September 13, 2026, about 1515 Pacific daylight time, a Cessna P210N airplane, N4617W, was substantially damaged when it was involved in an accident near San Luis Obispo, California. The pilot, pilot-rated-passenger, and a passenger were not injured. The… - [NTSB WPR25LA282](https://openairdocs.org/ntsb/WPR25LA282.md): Cessna P210N · Victorville, CA · Accident · No injuries · Class 3 · Limited · Preliminary report · Sep 13, 2025 · N25WD · Substantial damage > On September 13, 2025, about 1300 Pacific daylight time, a Cessna P210N airplane, N25WD, was substantially damaged when it was involved in an accident near Victorville, California. The pilot and flight instructor were not injured. The airplane was operated as… - [NTSB CEN25LA407](https://openairdocs.org/ntsb/CEN25LA407.md): Cessna 414 · Maryville, MO · Accident · No injuries · Class 4 · Limited · Final report · Aug 26, 2025 · N1668T · Substantial damage > The left landing gear collapsed on landing rollout due to a fractured retract bellcrank on the left landing gear lower fork assembly. - [NTSB WPR24LA126](https://openairdocs.org/ntsb/WPR24LA126.md): Cessna P210N · Auburn, WA · Accident · No injuries · Class 3 · Limited · Final report · Apr 11, 2024 · N806RC · Substantial damage > An overstress fracture of the left main landing gear actuator, which resulted in the failure of the left main landing gear to fully extend and lock into place. - [NTSB WPR23LA321](https://openairdocs.org/ntsb/WPR23LA321.md): Cessna T210M · Napa, CA · Accident · No injuries · Class 3 · Limited · Final report · Aug 21, 2023 · N6535B · Substantial damage > Insufficient hydraulic pressure to the landing gear system following the completion of the emergency gear extension checklist, which resulted in the main landing gear collapsing during landing. Contributing to the accident was a loss of electrical power for… - [NTSB WPR23LA012](https://openairdocs.org/ntsb/WPR23LA012.md): Cessna T210L · Marana, AZ · Accident · No injuries · Class 3 · Limited · Final report · Oct 10, 2022 · N2425S · Substantial damage > A failure of a retaining ring in the airplane’s left main landing gear door actuator and the subsequent complete loss of hydraulic fluid, which resulted in a gear-up landing. - [NTSB ERA22LA434](https://openairdocs.org/ntsb/ERA22LA434.md): Cessna 414 · Augusta, GA · Accident · No injuries · Class 3 · Limited · Final report · Sep 26, 2022 · N745EP · Substantial damage > The failure of the nose landing gear to fully extend and lock into position for reasons that could not be determined, which resulted in its collapse during landing. - [NTSB ERA22LA282](https://openairdocs.org/ntsb/ERA22LA282.md): Cessna 414 · Jasper, GA · Accident · No injuries · Class 3 · Limited · Final report · Jun 18, 2022 · N414HF · Substantial damage > The failure of the owner to comply with a service bulletin, which resulted in the failure of the left main landing gear torque tube due to fatigue cracking. - [NTSB WPR22LA228](https://openairdocs.org/ntsb/WPR22LA228.md): Cessna P210N · Palm Springs, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 4, 2022 · N4752K · Substantial damage > The failure of the pilot to ensure the landing gear was down and locked before landing. - [NTSB CEN22LA204](https://openairdocs.org/ntsb/CEN22LA204.md): Cessna T210N · Denver, CO · Accident · No injuries · Class 3 · Limited · Final report · May 17, 2022 · N210SD · Substantial damage > The main landing gear collapsed during landing for reasons that could not be determined. - [NTSB GAA22WA168](https://openairdocs.org/ntsb/GAA22WA168.md): Cessna 414A · Herzogenaurach, Germany · Accident · No injuries · Class 5 · Foreign · Apr 12, 2022 · N414K · Substantial damage - [NTSB ERA21LA147](https://openairdocs.org/ntsb/ERA21LA147.md): Cessna P210N · Johnstown, NY · Accident · No injuries · Class 3 · Limited · Final report · Mar 2, 2021 · N4629K · Substantial damage > A failure of the landing gear system hydraulic pump assembly for reasons that could not be determined based on available evidence. Contributing was the pilot’s failure to confirm that the landing gear was down and locked before landing. - [NTSB ANC19LA039](https://openairdocs.org/ntsb/ANC19LA039.md): Cessna 402 · Boise, ID · Accident · No injuries · Class 3 · Limited · Final report · Jul 22, 2019 · N7947Q · Substantial damage > A ductile overstress fracture failure of the right main landing gear bell crank assembly pivot bolt, which resulted in a collapse of the right main landing gear. - [NTSB WPR18LA057](https://openairdocs.org/ntsb/WPR18LA057.md): Cessna T210L · Aurora, OR · Accident · No injuries · Limited investigation · Final report · Jan 2, 2018 · N2122S · Substantial damage > A collapse of the right main landing gear during the landing roll because the gear would not lock into place. Contributing to the accident was the pilot's failure to perform the alternate landing gear extension procedure before landing. - [NTSB WPR18LA022](https://openairdocs.org/ntsb/WPR18LA022.md): Cessna P210N · Mount Vernon, WA · Accident · No injuries · Limited investigation · Final report · Oct 28, 2017 · N6582P · Substantial damage > The failure of the right main landing gear (MLG) down-lock mechanism due to an out-of-tolerance down-lock hook, which resulted in the collapse of the right MLG during the landing roll. - [NTSB WPR17LA204](https://openairdocs.org/ntsb/WPR17LA204.md): Cessna T210N · Watsonville, CA · Accident · No injuries · Class 3 · Limited · Final report · Sep 15, 2017 · N5391A · Substantial damage > The pilot’s improper landing flare, which resulted in a bounced landing and subsequent nose gear separation. - [NTSB CEN17LA148](https://openairdocs.org/ntsb/CEN17LA148.md): Cessna T210M · Detroit Lakes, MN · Accident · No injuries · Limited investigation · Final report · Apr 5, 2017 · N1215M · Substantial damage > The malfunction of the right main landing gear actuator for reasons that could not be determined because postaccident examination revealed no mechanical anomalies that would have precluded normal operation. Contributing to the accident was the improper… - [NTSB CEN17LA022](https://openairdocs.org/ntsb/CEN17LA022.md): Cessna T210L · Pflugerville, TX · Accident · No injuries · Limited investigation · Final report · Oct 18, 2016 · N210LC · Substantial damage > Landing gear collapse upon landing due to a hydraulic leak that led to insufficient pressure to fully extend and lock the gear in a down position. - [NTSB CEN16LA356](https://openairdocs.org/ntsb/CEN16LA356.md): Cessna P210N · Waco, TX · Accident · No injuries · Limited investigation · Final report · Aug 5, 2016 · N323DC · Substantial damage > The failure of the right main landing gear (MLG) down-lock mechanism, which resulted in the collapse of the landing gear. The root cause of the right MLG down-lock mechanism could not be determined because the components were not available for examination. - [NTSB WPR16LA058](https://openairdocs.org/ntsb/WPR16LA058.md): Cessna 340A · Bakersfield, CA · Accident · No injuries · Limited investigation · Final report · Jan 27, 2016 · N346MC · Substantial damage > Maintenance personnel’s repeated failure to re-rig the main landing gear (MLG) in accordance with the airplane manufacturer's service manual requirements, which resulted in the collapse of the right MLG. - [NTSB ERA16LA042](https://openairdocs.org/ntsb/ERA16LA042.md): Cessna P210 · Atlanta, GA · Accident · No injuries · Limited investigation · Final report · Nov 6, 2015 · N731LT · Substantial damage > The pilot's delayed extension of the landing gear and his failure to ensure that the main landing gear (MLG) were down and locked before touchdown, which resulted in the collapse of both MLG. Contributing to the landing gear collapse was the mis-set landing… - [NTSB ERA15LA058](https://openairdocs.org/ntsb/ERA15LA058.md): Cessna T210 · Tampa, FL · Accident · No injuries · Limited investigation · Final report · Nov 24, 2014 · N610KC · Substantial damage > The collapse of the left main landing gear for reasons that could not be determined during postaccident examination. - [NTSB WPR13CA413](https://openairdocs.org/ntsb/WPR13CA413.md): Cessna T310R · San Luis Obispo, CA · Accident · No injuries · Data collection · Final report · Sep 16, 2013 · N712SB · Substantial damage > The pilot's inadvertent action of retracting the landing gear instead of the flaps during the landing roll, which resulted in the right main landing gear collapsing. - [NTSB WPR13LA382](https://openairdocs.org/ntsb/WPR13LA382.md): Cessna 206 · Boise, ID · Accident · No injuries · Limited investigation · Final report · Aug 22, 2013 · N922MA · Substantial damage > The mechanical failure of the nose landing gear for reasons that could not be determined because impact damage prevented a complete examination. - [NTSB WPR13CA271](https://openairdocs.org/ntsb/WPR13CA271.md): Cessna T210N · Salmon, ID · Accident · No injuries · Data collection · Final report · Jun 14, 2013 · N6993N · Substantial damage > The pilot's decision to land on a wet grass airstrip, which resulted in a main landing gear collapse after a collision with rough terrain. - [NTSB CEN13LA208](https://openairdocs.org/ntsb/CEN13LA208.md): Cessna 421C · Amarillo, TX · Accident · No injuries · Limited investigation · Final report · Mar 27, 2013 · N805DC · Substantial damage > Maintenance personnel's failure to detect the misadjustment of the left landing gear actuator's switch after recent maintenance, which prevented the landing gear from locking in the extended position and resulted in the landing gear collapsing during landing. - [NTSB ERA12IA559](https://openairdocs.org/ntsb/ERA12IA559.md): Cessna 402B · Opa-Locka, FL · Incident · No injuries · Incident investigation · Final report · Sep 10, 2012 · N218LG · Minor damage > The pilot’s turning the airplane too sharply while exiting the runway, which resulted in the failure of the right main landing gear bellcrank due to an overstress fracture. - [NTSB CEN11LA494](https://openairdocs.org/ntsb/CEN11LA494.md): Cessna T210L · Columbia, MO · Accident · No injuries · Limited investigation · Final report · Jul 20, 2011 · N2056S · Substantial damage > The collapse of the right main landing gear during landing due to a lack of component lubrication, which resulted in the failure of the landing gear to lock once extended. - [NTSB CEN11LA357](https://openairdocs.org/ntsb/CEN11LA357.md): Cessna T210M · Pueblo, CO · Accident · No injuries · Limited investigation · Final report · May 21, 2011 · N6850B · Substantial damage > Failure of the landing gear to fully extend due to a failed o-ring in the nose gear actuator piston and a broken seal in the emergency landing gear extension system. - [NTSB WPR11LA108](https://openairdocs.org/ntsb/WPR11LA108.md): Piper PA-28-201T · Santa Ana, CA · Accident · No injuries · Limited investigation · Final report · Jan 21, 2011 · N47589 · Substantial damage > The failure of the left main landing gear due to the lack of lubrication. - [NTSB WPR10LA476](https://openairdocs.org/ntsb/WPR10LA476.md): Cessna 310R · Great Falls, MT · Accident · No injuries · Limited investigation · Final report · Sep 28, 2010 · N455TB · Substantial damage > The uncommanded retraction of the right main landing gear during taxi due to the failure of the landing gear extension system to move the right main gear upper side link into the locked position for undetermined reasons. - [NTSB WPR10LA191](https://openairdocs.org/ntsb/WPR10LA191.md): Beech 58 · Santa Barbara, CA · Accident · No injuries · Limited investigation · Final report · Mar 22, 2010 · N580TC · Substantial damage > The landing gear collapsing during the landing roll for undetermined reasons. - [NTSB WPR10LA147](https://openairdocs.org/ntsb/WPR10LA147.md): Beech 58 · Portland, OR · Accident · No injuries · Limited investigation · Final report · Feb 9, 2010 · N3700N · Substantial damage > The overstress failure of a nose landing gear mechanism bolt, which precluded the nose gear retract brace assembly from locking the nose gear in the extended position and allowed the nose landing gear to collapse. Contributing to the accident was the failure… - [NTSB ERA09LA474](https://openairdocs.org/ntsb/ERA09LA474.md): Cessna T210M · Dalton, GA · Accident · No injuries · Limited investigation · Final report · Aug 22, 2009 · N732MM · Substantial damage > The failure of the right main landing gear actuator downlock spring. - [NTSB ERA09IA267](https://openairdocs.org/ntsb/ERA09IA267.md): Cessna 402C · Nantucket, MA · Incident · No injuries · Incident investigation · Final report · Apr 27, 2009 · N769EA · Minor damage > Installation of an improper bearing in the landing gear actuator. - [NTSB SEA08LA079](https://openairdocs.org/ntsb/SEA08LA079.md): Cessna P210N · Carefree, AZ · Accident · No injuries · Limited investigation · Final report · Feb 10, 2008 · N4796K · Substantial damage > The collapse of the landing gear during landing rollout for undetermined reasons. ## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('17040') 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 ``` This list as a web page: https://openairdocs.org/ntsb-events/094/cases?engine=17040 --- 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.