# NTSB GAA18CA028: Stinson 108, N927D, Lewiston, ID, October 26, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: October 26, 2017, 12:30 local (20:30 UTC) - Place: Lewiston, ID - Coordinates: 46.374443, -117.015274 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=46.3744&lon=-117.0153&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 May 14, 2018 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 96254 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA028 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/96254/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=96254 - Page: https://openairdocs.org/ntsb/GAA18CA028 ## Probable cause The pilot’s failure to maintain directional control during the landing roll. Contributing to the accident was the pilot’s failure to obtain appropriate training in the airplane before flying solo. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [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) - [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) - [Training: training with equipment](https://openairdocs.org/ntsb-findings/02031530): Personnel issues › Experience/knowledge · Pilot (probable cause); cases with it: [Stinson 108-2, 1 case](https://openairdocs.org/ntsb-findings/02031530/cases.md?model=9230406), [All aircraft, 32 cases](https://openairdocs.org/ntsb-findings/02031530/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 108-2, 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: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Stinson 108-2, 9 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=9230406), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to the pilot in the tailwheel-equipped airplane, this was his first solo flight in the airplane. During the landing roll, the airplane decelerated and veered to the left. The pilot reported that he overcorrected, and the airplane veered to the right. The airplane exited the runway, and the left wing struck the ground during the right ground loop. The airplane sustained substantial damage to the left-wing spar and aileron. The METAR at the accident airport reported that, about the time of the accident, the wind was calm, and the sky was clear. The pilot noted in the National Transportation Safety Board's Pilot Aviation Accident Report Operator/Owner Safety Recommendation section that this type of accident could have been prevented if he had "flown with a properly rated pilot (tailwheel endorsed) and practiced landings before flying…solo." The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Factual narrative According to the pilot in the tailwheel-equipped airplane, this was his first solo flight in the airplane. During the landing roll, the airplane decelerated and veered to the left. The pilot reported that he over corrected and the airplane veered to the right. The airplane exited the runway and the left wing struck the ground during the right ground loop. The airplane sustained substantial damage to the left-wing spar and aileron. The METAR at the accident airport, reported that about the time of the accident, the wind was calm, and the sky was clear. The National Transportation Safety Board's Pilot Aviation Accident Report identified in the Operator/Owner Safety Recommendation Section, that this type of accident could have been prevented if he had, "flown with a properly rated pilot (tailwheel endorsed) and practiced landings before flying… solo." The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N927D](https://openairdocs.org/aircraft/N927D), registered now, S/N 108-2927, 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: 108-2927 - Year built: 1947 - Airframe hours: 1585 - Engines: FRANKLIN 6A4165 SERIES 165 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 18, 2017 - Departed: KLWS, Lewiston, ID - Destination: LWS, Lewiston, ID - Airport: LWS, Lewiston-Nez Perce County, runway 30, 5,002 × 100 ft, asphalt - Equipment: None ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 40; injuries: none; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review August 28, 2017; seat: front; restraint: lap only; flight hours: 763 total, 1 in this make and model, 695 as pilot in command, 46 in the last 90 days, 15 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 48 °F - Altimeter: 30.29 inHg - Observed at: KLWS ## 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 20171026020349A](https://openairdocs.org/incident/20171026020349A), Oct 26, 2017: Stinson 108-2, Lewiston, ID, Substantial damage. During landing rollout the pilot lost control and ground looped the airplane. As the airplane veered right and departed the runway, the left wingtip struck the… ## Docket (2 files) The files NTSB released with the investigation on March 29, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=96254. 3.7 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40461405&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=40461406&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.