# NTSB CEN20CA317: Cessna 120, N1926N, Osceola, WI, July 17, 2020 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Data collection · Final report - Date: July 17, 2020, 11:15 local (16:15 UTC) - Place: Osceola, WI - Coordinates: 45.309444, -92.690002 - Nearby events: https://openairdocs.org/map.md?lat=45.3094&lon=-92.6900&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: MSP-FSDO - NTSB case key (mKey): 101700 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN20CA317 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/101700/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=101700 - Page: https://openairdocs.org/ntsb/CEN20CA317 ## Probable cause The pilots did not maintain directional control of the airplane during landing. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Cessna 120, 11 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2071402), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Student/instructed pilot (probable cause); cases with it: [Cessna 120, 22 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2071402), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Instructor/check pilot (probable cause); cases with it: [Cessna 120, 22 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2071402), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Cessna 120, 19 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2071402), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The flight instructor, and the pilot receiving instruction, both reported that during tailwheel transition training, the airplane drifted to the right of the runway while performing a wheel-landing. They reported that left rudder was applied to counteract the drift, but the airplane did not respond as expected. The pilot receiving instruction stated that the airplane exited the runway, the left wheel caught the terrain, and the airplane nosed over. The airplane sustained substantial damage to the left wing, vertical stabilizer, and rudder. Neither pilot reported any mechanical failures or malfunctions of the airplane that precluded normal operation. Both pilots reported the wind condition as light and variable. ## Aircraft - Registration: [N1926N](https://openairdocs.org/deregistered/N1926N-2022-07-21), registration cancelled 2022-07-21, S/N 12170, built 1947 (OpenAirDocs) - Reported make and model: Cessna 120 (No Series) - Registry model: [Cessna 120](https://openairdocs.org/model/cessna-120) (registry code 2071402) (OpenAirDocs) - Registry engine: [Continental C85 series](https://openairdocs.org/engine/continental-c85-series) (registry code 17008, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 12170 - Year built: 1947 - Engines: Continental C85 SERIES 85 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 1, 2019 - Departed: OEO, Osceola, WI - Destination: OEO, Osceola, WI - Airport: OEO, L O Simenstad Municipal Arpt, runway 10, 5,006 × 75 ft, asphalt - Equipment: ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; commercial, flight instructor; airplane ratings: single-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, with waivers/limitations; seat: right; restraint: 3-point; flight hours: 2,180 total, 58 in this make and model, 2,082 as pilot in command, 48 in the last 90 days, 23 in the last 30 days, 0 in the last 24 hours - Student pilot; age 43; injuries: none; flight instructor, commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; seat: left; restraint: 3-point; flight hours: 3,000 total, 2 in this make and model, 2,965 as pilot in command, 140 in the last 90 days, 65 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 72 °F - Altimeter: 30.04 inHg - Observed at: KOEO ## 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 20200717011969A](https://openairdocs.org/incident/20200717011969A), Jul 17, 2020: Cessna 120, Osceola, WI, Substantial damage. Pilot landed aircraft left of the runway center line, during the roll out the plane veered to the right and exited the runway and flipped over. Two persons on… ## Other investigations on N1926N (1) 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. - [NTSB OAK70DVA22](https://openairdocs.org/ntsb/OAK70DVA22), Jun 5, 1970: Cessna 120 (N1926N), Turlock, CA, substantial damage ## Docket (3 files) The files NTSB released with the investigation on September 11, 2020, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=101700. 4.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 658 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40486868&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Student - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 2, .PDF, 504 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40486869&FileExtension=.PDF&FileName=Student%20-%20Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photos (item 3, .PDF, 3.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40486870&FileExtension=.PDF&FileName=Photos-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.