# NTSB GAA16CA424: Stinson 108, N9250K, Sunriver, OR, August 5, 2016 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: August 5, 2016, 14:20 local (21:20 UTC) - Place: Sunriver, OR - Coordinates: 43.877498, -121.452499 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.8775&lon=-121.4525&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: 1 uninjured - Status: Completed, report December 5, 2016 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 93801 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA16CA424 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/93801/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=93801 - Page: https://openairdocs.org/ntsb/GAA16CA424 ## Probable cause The pilot's failure to maintain directional control during the landing roll in gusting wind conditions, which resulted in runway excursion and 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: [Stinson 108-2, 13 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=9230406), [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: [Stinson 108-2, 14 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=9230406), [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 operation; cases with it: [Stinson 108-2, 1 case](https://openairdocs.org/ntsb-findings/03034045/cases.md?model=9230406), [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: Other weather encounter](https://openairdocs.org/ntsb-events/400); cases with it: [Stinson 108-2, 2 cases](https://openairdocs.org/ntsb-events/400/sequence.md?model=9230406), [All aircraft, 1,127 cases](https://openairdocs.org/ntsb-events/400/sequence.md) - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Stinson 108-2, 13 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=9230406), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Runway excursion](https://openairdocs.org/ntsb-events/300); cases with it: [Stinson 108-2, 7 cases](https://openairdocs.org/ntsb-events/300/sequence.md?model=9230406), [All aircraft, 3,643 cases](https://openairdocs.org/ntsb-events/300/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Stinson 108-2, 8 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=9230406), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot of the tailwheel equipped airplane reported that during the landing roll in gusty wind conditions, the airplane veered off the runway to the right. The pilot further reported that he "applied full brakes" to avoid a bush, subsequently the airplane nosed over. The airplane sustained substantial damage to both left lift struts. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. A review of recorded data from the automated weather observation station located on the airport, revealed that, about 5 minutes before the accident the wind was 360 degrees true at 7 knots, and wind gusts 13 knots. The airplane landed on runway 36. ## Factual narrative The pilot of the tailwheel equipped airplane reported that during the landing roll in gusty wind conditions, the airplane veered off the runway to the right. The pilot further reported that he "applied full brakes" to avoid a bush, subsequently the airplane nosed over. The airplane sustained substantial damage to both left lift struts. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. A review of recorded data from the automated weather observation station located on the airport, revealed that, about 5 minutes before the accident the wind was 360 degrees true at 7 knots, and wind gusts 13 knots. The airplane landed on runway 36. ## Aircraft - Registration: [N9250K](https://openairdocs.org/aircraft/N9250K), registered now, S/N 108-2250, built 1947 (OpenAirDocs) - Reported make and model: STINSON 108 (2) - Registry model: [Stinson 108-2](https://openairdocs.org/model/stinson-108-2) (registry code 9230406) (OpenAirDocs) - Registry engine: [Franklin 6A4165 series](https://openairdocs.org/engine/franklin-6a4165-series) (registry code 27025, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 108-2250 - Year built: 1947 - Airframe hours: 3123 - Engines: FRANKLIN 6A4-165-B3 165 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 22, 2016 - Departed: PAE, EVERETT, WA - Destination: S21, Sunriver, OR - Flight plan: Unknown - Airport: S21, Sunriver, runway 36, 5,461 × 75 ft, asphalt - Equipment: Stall warning system ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: none; private; airplane ratings: single-engine land; medical: class 3, without waivers/limitations; last flight review December 17, 2014; seat: left; flight hours: 109 total, 30 in this make and model, 77 as pilot in command, 30 in the last 90 days, 14 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 360° at 7 knots, gusting 13 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 36 °F - Altimeter: 29.88 inHg - Observed at: KS21 ## 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 20160805013449A](https://openairdocs.org/incident/20160805013449A), Aug 5, 2016: Stinson 108-2, Sunriver, OR, Substantial damage. The pilot in command did not adequately correct for left crosswind during landing and allowed the Stinson S-108 airplane to drift right of centerline at… ## Docket (1 files) The files NTSB released with the investigation on October 31, 2016, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=93801. 314 KB in all. - Accident Photo (Courtesy of FAA) (item 1, .PDF, 1 photo, 314 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40445884&FileExtension=.PDF&FileName=Accident%20Photo%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.