# NTSB GAA16CA238: Waco YKS 7, N17734, Millersburg, OH, May 13, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: May 13, 2016, 11:55 local (15:55 UTC) - Place: Millersburg, OH - Coordinates: 40.536666, -81.955833 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.5367&lon=-81.9558&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report September 12, 2016 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: Federal Aviation Administration - NTSB case key (mKey): 93186 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA16CA238 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93186/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93186 - Page: https://openairdocs.org/ntsb/GAA16CA238 ## Probable cause The pilot's loss of directional control during landing in gusting wind conditions resulting in excessive brake application, and airplane nose over. ## 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: [Waco YKS-7, 3 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=9600835), [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 · Pilot (probable cause); cases with it: [Waco YKS-7, 3 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=9600835), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on equipment (probable cause); cases with it: [Waco YKS-7, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=9600835), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Abnormal runway contact](https://openairdocs.org/ntsb-events/090); cases with it: [Waco YKS-7, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=9600835), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Waco YKS-7, 2 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=9600835), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Waco YKS-7, 2 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=9600835), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis According to the pilot of the tailwheel-equipped airplane, he executed a wheel landing in gusting crosswind conditions. He reported that the airplane swerved left, he applied right rudder and right brake to no avail, and then he applied both brakes to prevent a runway excursion. The airplane nosed over and exited the runway. The airplane sustained substantial damage to the left wing strut, rudder and vertical stabilizer. The pilot reported that there were not any mechanical anomalies or malfunctions with any portion the airplane prior to the accident that would have prevented normal flight operations. ## Factual narrative According to the pilot of the tailwheel-equipped airplane, he executed a wheel landing in gusting crosswind conditions. He reported that the airplane swerved left, he applied right rudder and right brake to no avail, and then he applied both brakes to prevent a runway excursion. The airplane nosed over and exited the runway. The airplane sustained substantial damage to the left wing strut, rudder and vertical stabilizer. The pilot reported that there were not any mechanical anomalies or malfunctions with any portion the airplane prior to the accident that would have prevented normal flight operations. ## Aircraft - Registration: [N17734](https://openairdocs.org/aircraft/N17734), registered now, S/N 4636, built 1937 (OpenAirDocs) - Reported make and model: WACO YKS 7 (NO SERIES) - Registry model: [Waco YKS-7](https://openairdocs.org/model/waco-yks-7) (registry code 9600835) (OpenAirDocs) - Registry engine: [Jacobs L4 /R755-7](https://openairdocs.org/engine/jacobs-l4-r755-7) (registry code 35003, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 4636 - Year built: 1937 - Airframe hours: 2059 - Engines: JACOBS L4 /R755-7 275 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal; Standard, Utility - Last inspection: Annual, May 6, 2016 - Departed: AAA, LINCOLN, IL - Destination: 10G, Millersburg, OH - Flight plan: IFR - Airport: 10G, Holmes County, runway 27, 4,400 × 65 ft, asphalt - Equipment: None ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 75; injuries: none; airline transport; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 3, waiver time limited special; last flight review February 12, 2016; seat: left; restraint: lap only; flight hours: 11,570 total, 18 in this make and model, 8,475 as pilot in command, 37 in the last 90 days, 19 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 15 knots, gusting 23 - Visibility: 10 statute miles - Lowest ceiling: 4,700 ft broken - Temperature: 63 °F, dew point 48 °F - Altimeter: 29.95 inHg - Observed at: KBJJ, 20 nm away ## Docket (2 files) The files NTSB released with the investigation on September 1, 2016, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93186. 2.0 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40444098&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 103 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40444099&FileExtension=.PDF&FileName=Photo%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.