# NTSB WPR23LA109: Stinson 108-1, N8135K, Morgan, UT, February 12, 2023 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: February 12, 2023, 16:00 local (23:00 UTC) - Place: Morgan, UT · Airport 42U - Coordinates: 41.148677, -111.76714 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.1487&lon=-111.7671&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: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Western Pacific Region - Parties: FAA - NTSB case key (mKey): 106729 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR23LA109 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/106729/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=106729 - Page: https://openairdocs.org/ntsb/WPR23LA109 ## Probable cause The pilot’s failure to maintain directional control 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: [Stinson 108-1, 10 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=9230404), [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 108-1, 10 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=9230404), [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-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Stinson 108-1, 13 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=9230404), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing: Collision during takeoff/land](https://openairdocs.org/ntsb-events/490); cases with it: [Stinson 108-1, 2 cases](https://openairdocs.org/ntsb-events/490/sequence.md?model=9230404), [All aircraft, 1,309 cases](https://openairdocs.org/ntsb-events/490/sequence.md) - [Landing-landing roll: Nose over/nose down](https://openairdocs.org/ntsb-events/096); cases with it: [Stinson 108-1, 6 cases](https://openairdocs.org/ntsb-events/096/sequence.md?model=9230404), [All aircraft, 2,287 cases](https://openairdocs.org/ntsb-events/096/sequence.md) ## Analysis The pilot of the tailwheel-equipped airplane reported that, during landing, and after the tailwheel touched the ground, the airplane began turning to the left. The pilot made an abrupt control input with the right rudder, which resulted in the airplane veering to the right side of the runway and colliding with a snowbank. The airplane subsequently nosed over substantially damaging the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N8135K](https://openairdocs.org/aircraft/N8135K), registered now, S/N 108-1135, built 1946 (OpenAirDocs) - Reported make and model: STINSON 108-1 - Registry model: [Stinson 108-1](https://openairdocs.org/model/stinson-108-1) (registry code 9230404) (OpenAirDocs) - Registry engine: [Franklin 6A4150 series](https://openairdocs.org/engine/franklin-6a4150-series) (registry code 27024, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 108-1135 - Year built: 1946 - Airframe hours: 3063 - Engines: FRANKLIN 6A4150 SERIES 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Head In The Clouds LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 1, 2022 - Destination: Same as departure - Airport: 42U, Morgan County, runway 21, 3,904 × 50 ft, asphalt - Equipment: ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: none; commercial, airline transport, flight instructor, private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review March 1, 2022; seat: left; flight hours: 18,000 total, 110 in this make and model, 3,100 as pilot in command, 260 in the last 90 days, 85 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 260° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 37 °F, dew point 21 °F - Altimeter: 30.09 inHg - Observed at: KHIF, 9 nm away - METAR: KHIF 122255Z AUTO 26003KT 10SM CLR 03/M06 A3009 RMK AO2 SLP200 T00281061 ## 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 20230212002169A](https://openairdocs.org/incident/20230212002169A), Feb 12, 2023: Stinson 108-1, Morgan, UT, Substantial damage. Pilot touched down and slowed. The tailwheel touched down as well. The aircraft started to turn left, pilot applied right rudder. Right rudder was too abrupt… ## Docket (2 files) The files NTSB released with the investigation on March 23, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=106729. 9.5 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 8.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15181454&FileExtension=pdf&FileName=6120%20f_Redacted-Rel.pdf - Photos (item 2, PDF, 1 page, 543 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=15180412&FileExtension=pdf&FileName=Docket%20photo%20WPR23LA109-Rel.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.