# NTSB ERA15LA058: Cessna T210, N610KC, Tampa, FL, November 24, 2014 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 24, 2014, 11:07 local (16:07 UTC) - Place: Tampa, FL - Coordinates: 27.915555, -82.449447 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=27.9156&lon=-82.4494&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 3, 2016 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 90424 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA15LA058 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/90424/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=90424 - Page: https://openairdocs.org/ntsb/ERA15LA058 ## Probable cause The collapse of the left main landing gear for reasons that could not be determined during postaccident examination. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Cessna T210N, 8 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2073456), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094) (defining event); cases with it: [Cessna T210N, 8 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2073456), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) - [Landing-flare/touchdown: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Cessna T210N, 12 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=2073456), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) ## Analysis According to the commercial pilot, during the approach to land after the personal flight, he observed that the green landing gear indicator light was illuminated. He further reported that the gear warning horn did not sound before touchdown. During the landing, the left main landing gear (MLG) collapsed, and the left wing sank toward the runway. The pilot applied full power; however, the airplane had insufficient airspeed to climb out of ground effect, and it subsequently impacted the runway and then came to rest. Postaccident examination revealed that the landing gear handle was in the "down" position and that the nose landing gear and right MLG were extended and locked. Testing revealed that the landing gear retracted and extended normally with no mechanical abnormalities or malfunctions noted. Although a video recorded by an airport security camera showed the airplane crossing the runway threshold with both the left and right MLG down, it could not be determined if they were in the "locked" position. The reason for the collapse of the left MLG could not be determined. ## Factual narrative On November 24, 2014, about 1107 eastern standard time, a Cessna T210N, N610KC, experienced a left main landing gear collapse and runway excursion during landing at Peter O. Knight Airport (TPF), Tampa, Florida. The certificated commercial pilot and passenger were not injured. The airplane sustained substantial damage to the left horizontal stabilizer, vertical stabilizer, and the left wing tip. Visual meteorological conditions prevailed and no flight plan was filed for the aerial observation flight that departed Bartow Municipal Airport (BOW), Bartow, Florida, about 1030. The airplane was registered to and operated by U.S. Imaging Inc under the provisions of Title 14 Code of Federal Regulations Part 91.The pilot reported that the he entered a left base and about 4 miles from the airport he extended the landing gear to the "DOWN" position. He observed the green landing gear indicator light, which indicated that the landing gear was in the down and locked position. He further reported that at no time during the approach, did the gear audible warning horn sound to alert the pilot of an unsafe landing gear condition. After touchdown he felt "the left side of the plane sink" and he immediately applied full power. However, due to the insufficient airspeed he decided to perform the "emergency landing." He further reported that no work had been performed to the landing gear prior to the accident. Initial examination by a Federal Aviation Administration (FAA) inspector revealed that the landing gear handle was in the "DOWN" position and the nose landing gear and right main landing gear were extended and in the locked positions. The airplane was raised and the left main landing gear extended and locked into place. The airplane was subsequently towed to a ramp. A follow-on examination of the airplane's landing gear system by another FAA inspector revealed that the gear retraction and extension system operated as intended. During the examination the gear horn was audibly observed sounding regardless of the throttle position. No other abnormalities or malfunctions were detected that would have precluded normal operation. Examination of airport security video revealed the airplane crossing the runway threshold while still in flight about 1107. The video revealed the airplane's main landing gear was down; however, it could not be conclusively determined if it was "locked" into place. Immediately after touchdown, the left side of the airplane was observed settling to the runway. Approximately 1 second later, the airplane became airborne again and continued out of the camera's recordable view. A second security camera recording captured the airplane on the paved portion of the runway in a left wing low attitude. The airplane continued down the runway until veering to the left, facing the camera, and coming to rest. ## Aircraft - Registration: [N610KC](https://openairdocs.org/aircraft/N610KC), registered now, S/N 21064258, built 1981 (OpenAirDocs) - Reported make and model: CESSNA T210 (N) - Registry model: [Cessna T210N](https://openairdocs.org/model/cessna-t210n) (registry code 2073456) (OpenAirDocs) - Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 21064258 - Year built: 1981 - Airframe hours: 8583 - Engines: Teledyne Continental Motors TSIO-520-R 310 horsepower reciprocating - Damage: Substantial damage - Flight: Aerial observation, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 26, 2014 - Departed: BOW, BARTOW, FL - Destination: TPF, TAMPA, FL - Airport: TPF, Peter O Knight, runway 22, 3,580 × 100 ft, asphalt - Equipment: Onboard weather, Satellite tracking device, Stall warning system, ADS-B, Angle of attack indicator, Electronic multifunction display, Handheld GPS ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 26; injuries: none; commercial, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review February 20, 2014; seat: left; restraint: lap only; flight hours: 2,634 total, 904 in this make and model, 2,405 as pilot in command, 161 in the last 90 days, 54 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 73 °F - Altimeter: 29.97 inHg - Observed at: KTPF ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20141124022919A](https://openairdocs.org/incident/20141124022919A), Nov 24, 2014: Cessna T210N, Tampa, FL, Substantial damage. During landing left gear collapse causing aircraft to drift out of center into the grass and spinning 180 degrees after knocking down a runway sign with left… ## Docket (7 files) The files NTSB released with the investigation on December 24, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=90424. 6.6 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 2.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435170&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Email from Pilot on No Recent Maintenance to Landing Gear (item 2, .PDF, 80 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435171&FileExtension=.PDF&FileName=Email%20from%20Pilot%20on%20No%20Recent%20Maintenance%20to%20Landing%20Gear-Master.PDF - Memorandum for Record - Phone Conversation with FAA Inspector on Damage (item 3, .PDF, 112 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435172&FileExtension=.PDF&FileName=Memorandum%20for%20Record%20-%20Phone%20Conversation%20with%20FAA%20Inspector%20on%20Damage-Master.PDF - FAA Inspector Statement on Landing Gear Operational Examination (item 4, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435173&FileExtension=.PDF&FileName=FAA%20Inspector%20Statement%20on%20Landing%20Gear%20Operational%20Examination-Master.PDF - Peter O'Knight Airport Recorded Weather (item 5, .PDF, 101 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435174&FileExtension=.PDF&FileName=Peter%20O%27Knight%20Airport%20Recorded%20Weather-Master.PDF - Airport Security Camera Stills (Courtesy of Tampa Bay Airport Authority) (item 6, .PDF, 19 photos, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435175&FileExtension=.PDF&FileName=Airport%20Security%20Camera%20Stills%20(Courtesy%20of%20Tampa%20Bay%20Airport%20Authority)-Master.PDF - Photos (Courtesy of FAA) (item 7, .PDF, 5 photos, 707 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40435176&FileExtension=.PDF&FileName=Photos%20(Courtesy%20of%20FAA)-Master.PDF From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- 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.