# NTSB WPR10CA290: Waco UKC-S, N14611, Seattle, WA, June 14, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: June 13, 2010, 18:35 local (Jun 14, 2010, 01:35 UTC) - Place: Seattle, WA - Coordinates: 47.529998, -122.30194 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.5300&lon=-122.3019&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 July 22, 2010 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 76308 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR10CA290 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/76308/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=76308 - Page: https://openairdocs.org/ntsb/WPR10CA290 ## Probable cause The pilot’s inadequate compensation for the crosswind condition, resulting in a loss of directional control during the landing roll. ## 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 UKC-S, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=9600810), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Wind: gusts](https://openairdocs.org/ntsb-findings/03034045): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Waco UKC-S, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=9600810), [All aircraft, 1,199 cases](https://openairdocs.org/ntsb-findings/03034045/cases.md) - [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Waco UKC-S, 1 case](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=9600810), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/cases.md) - [Wind: crosswind](https://openairdocs.org/ntsb-findings/03034040): Environmental issues › Conditions/weather/phenomena · Response/compensation (probable cause); cases with it: [Waco UKC-S, 1 case](https://openairdocs.org/ntsb-findings/03034040/cases.md?model=9600810), [All aircraft, 1,008 cases](https://openairdocs.org/ntsb-findings/03034040/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: [Waco UKC-S, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=9600810), [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: [Waco UKC-S, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=9600810), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot stated that prior to entering the traffic pattern in a tail-wheel equipped airplane for landing on runway 31L, the airport’s automatic terminal information service (ATIS) indicated that the wind was from 040 degrees at 11 knots, gusting to 15 knots. The pilot said the maximum crosswind component for the airplane is 15 knots and that he has previously landed this airplane in similar crosswind conditions. Throughout the traffic pattern the pilot requested the wind direction and speed from the controller and on short final, the wind was reported from 030 degrees at 11 knots. The landing was uneventful; however, during the landing roll, a gust of wind lifted the right wing and despite the pilot’s control inputs, the left wing scraped the ground as the airplane turned to the right. Subsequently, the left main landing gear collapsed. The airplane slid and came to a rest perpendicular to the runway. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. The weather reporting station located at the accident airport reported the wind at the time of the accident was from 030 degrees at 8 knots gusting to 17 knots. In a written statement, the pilot stated that the accident could have been prevented by landing at a nearby airport until conditions improved. ## Factual narrative The pilot stated that prior to entering the traffic pattern in a tail-wheel equipped airplane for landing on runway 31L, the airport’s automatic terminal information service (ATIS) indicated that the wind was from 040 degrees at 11 knots, gusting to 15 knots. The pilot said the maximum crosswind component for the airplane is 15 knots and that he has previously landed this airplane in similar crosswind conditions. Throughout the traffic pattern the pilot requested the wind direction and speed from the controller and on short final, the wind was reported from 030 degrees at 11 knots. The landing was uneventful; however, during the landing roll, a gust of wind lifted the right wing and despite the pilot’s control inputs, the left wing scraped the ground as the airplane turned to the right. Subsequently, the left main landing gear collapsed. The airplane slid and came to a rest perpendicular to the runway. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident. The weather reporting station located at the accident airport reported the wind at the time of the accident was from 030 degrees at 8 knots gusting to 17 knots. In a written statement, the pilot stated that the accident could have been prevented by landing at a nearby airport until conditions improved. ## Aircraft - Registration: [N14611](https://openairdocs.org/aircraft/N14611), registered now, S/N 3978, built 1935 (OpenAirDocs) - Reported make and model: WACO UKC-S - Registry model: [Waco UKC-S](https://openairdocs.org/model/waco-ukc-s) (registry code 9600810) (OpenAirDocs) - Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 3978 - Airframe hours: 2005 - Engines: CONT MOTOR W670 SERIES 250 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Kenneth D. Horwitz - Registered owner: Gold Cap LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 4, 2010, 21 hours before - Departed: WA96, Bremerton, WA - Destination: KBFI, Seattle, WA - Airport: KBFI, Boeing Field, runway 31L, 10,000 × 200 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; injuries: none; commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review April 21, 2010; seat: left; flight hours: 6,482 total, 25 in this make and model, 6,482 as pilot in command, 58 in the last 90 days, 40 in the last 30 days, 9 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 30° at 8 knots, gusting 17 - Visibility: 10 statute miles - Lowest ceiling: 4,800 ft broken - Temperature: 64 °F, dew point 45 °F - Altimeter: 30.22 inHg - Observed at: BFI ## 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 20100613005259A](https://openairdocs.org/incident/20100613005259A), Jun 13, 2010: Waco UKC-S, Seattle, WA, Substantial damage. On 06/13/2010 at approximately 18:20 PDT a Waco Ukc-S aircraft, serial number 3978,owned by [privacy data omitted] lost control during landing at the Boeing… ## Docket (1 files) The files NTSB released with the investigation on June 18, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=76308. 499 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 499 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40331518&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.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.