# NTSB CEN17LA322: Classic Waco YMF, N17XK, Hamilton, OH, July 5, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 4, 2017, 19:00 local (Jul 5, 2017, 00:00 UTC) - Place: Hamilton, OH - Coordinates: 39.363887, -84.525558 - Nearby events: https://openairdocs.org/map.md?lat=39.3639&lon=-84.5256&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: 3 uninjured - Status: Completed, report July 5, 2018 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA FSDO - NTSB case key (mKey): 95847 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN17LA322 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/95847/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=95847 - Page: https://openairdocs.org/ntsb/CEN17LA322 ## Probable cause The pilot's loss of directional control after landing for reasons that could not be determined because an examination of the airplane did not reveal any anomalies that would have precluded normal operation. ## 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: [Classic WACO YMF, 3 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=2240101), [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: [Classic WACO YMF, 3 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2240101), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Classic WACO YMF, 1 case](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=2240101), [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-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Classic WACO YMF, 4 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=2240101), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Classic WACO YMF, 2 cases](https://openairdocs.org/ntsb-events/094/sequence.md?model=2240101), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The commercial pilot and two passengers had completed a local flight. After a routine touchdown and landing roll, the pilot applied the brakes to initiate a right turn onto a taxiway. The pilot reported that the right brake "grabbed immediately," causing the airplane to ground loop. A postaccident examination and disassembly of the brake system revealed no mechanical anomalies that would have precluded normal operation. The reason for the reported brake malfunction could not be determined. ## Factual narrative On July 4, 2017, about 1900 eastern daylight time, a Waco YMF airplane, N17XK, experienced a gear collapse after landing at the Butler County Regional Airport-Hogan Field, Hamilton, Ohio. The pilot and two passengers were not injured, and the airplane was substantially damage. The airplane was registered to and operated by Adventure Airtours, LLC, under the provisions of 14 Code of Federal Regulations Part 91 as a local sightseeing flight. Visual meteorological conditions prevailed at the time. The pilot reported that he just completed a local flight and was landing on runway 11. After a routine touchdown and roll out, he applied the brakes to initiate a right turn onto a taxiway. The pilot added that the right brake "grabbed immediately", causing the airplane to turn clockwise to the left. The pilot also added that the tailwheel was down and in the locked position. The left wing struck the ground and the left landing gear collapsed; the airplane came to a stop on the runway. An inspection of the airplane by the responding Federal Aviation Administration inspector noted damage to the left main landing gear and substantial damage to the left wing spar. The airplane was recovered and transported to the manufacturer's facility for repair. During disassembly of the landing gear and braking system, the manufacturer did not find any evidence of a failure in the braking system. ## Aircraft - Registration: [N17XK](https://openairdocs.org/aircraft/N17XK), registered now, S/N F5C-048 (OpenAirDocs) - Reported make and model: CLASSIC AIRCRAFT CORP WACO YMF (NO SERIES) - Registry model: [Classic WACO YMF](https://openairdocs.org/model/classic-waco-ymf) (registry code 2240101) (OpenAirDocs) - Category: Airplane - Serial number: F5C-048 - Airframe hours: 582.9 - Engines: reciprocating - Damage: Substantial damage - Flight: Other work use, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 18, 2016 - Departed: KHAO, Hamilton, OH - Destination: KHAO, Hamilton, OH - Airport: KHAO, Butler County Regional Airport, runway 11, 5,500 × 80 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 71; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review June 29, 2016; seat: rear; restraint: 3-point; flight hours: 1,896.5 total, 48.5 in this make and model, 2.5 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 20° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: 4,900 ft broken - Temperature: 84 °F, dew point 70 °F - Altimeter: 30.02 inHg - Observed at: KHAO ## Docket (3 files) The files NTSB released with the investigation on January 17, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=95847. 1.2 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459419&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Pilot Report to FAA (item 2, .PDF, 19 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459420&FileExtension=.PDF&FileName=Pilot%20Report%20to%20FAA-Master.PDF - Memo (item 3, .PDF, 92 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40459421&FileExtension=.PDF&FileName=Memo-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.