# NTSB WPR23LA328: Luscombe 8A, N28841, Hillsboro, OR, August 27, 2023 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: August 26, 2023, 17:10 local (Aug 27, 2023, 00:10 UTC) - Place: Hillsboro, OR · Stark's Twin Oaks Airpark - Coordinates: 45.42845, -122.94215 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=45.4284&lon=-122.9421&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: Federal Aviation Administration - NTSB case key (mKey): 192969 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR23LA328 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/192969/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=192969 - Page: https://openairdocs.org/ntsb/WPR23LA328 ## Probable cause The student pilot’s failure to maintain airplane control during the landing roll and the flight instructor’s delayed remedial action, which resulted in a ground loop. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Training: initial instruct/training](https://openairdocs.org/ntsb-findings/02031515): Personnel issues › Experience/knowledge · Student/instructed pilot; cases with it: [Luscombe 8A, 1 case](https://openairdocs.org/ntsb-findings/02031515/cases.md?model=8190104), [All aircraft, 9 cases](https://openairdocs.org/ntsb-findings/02031515/cases.md) - [Use of equip/info: use of equip/system](https://openairdocs.org/ntsb-findings/02063015): Personnel issues › Task performance · Student/instructed pilot (probable cause); cases with it: [Luscombe 8A, 8 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md?model=8190104), [All aircraft, 1,391 cases](https://openairdocs.org/ntsb-findings/02063015/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained; cases with it: [Luscombe 8A, 27 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=8190104), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Experience/qualifications: total experience w/ equipment](https://openairdocs.org/ntsb-findings/02031025): Personnel issues › Experience/knowledge · Student/instructed pilot (probable cause); cases with it: [Luscombe 8A, 1 case](https://openairdocs.org/ntsb-findings/02031025/cases.md?model=8190104), [All aircraft, 269 cases](https://openairdocs.org/ntsb-findings/02031025/cases.md) - [Action: delayed action](https://openairdocs.org/ntsb-findings/02041025): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Luscombe 8A, 3 cases](https://openairdocs.org/ntsb-findings/02041025/cases.md?model=8190104), [All aircraft, 894 cases](https://openairdocs.org/ntsb-findings/02041025/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: [Luscombe 8A, 32 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=8190104), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The student pilot of the tailwheel-equipped airplane reported that, during the landing roll after the initial touch down, the airplane veered to the right. He applied excessive left rudder input to correct it, causing the airplane to oscillate left and right. The flight instructor attempted to regain the directional control, but his foot became caught. As the airplane decelerated and the oscillation increased, the airplane ground looped to the left, resulting in substantial damage to the right wing and aileron. The student pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N28841](https://openairdocs.org/aircraft/N28841), registered now, S/N 1583, built 1940 (OpenAirDocs) - Reported make and model: LUSCOMBE 8A - Registry model: [Luscombe 8A](https://openairdocs.org/model/luscombe-8a) (registry code 8190104) (OpenAirDocs) - Registry engine: [Continental A&C65 series](https://openairdocs.org/engine/continental-a-c65-series) (registry code 17003, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1583 - Year built: 1940 - Engines: CONT MOTOR A&C65 SERIES 65 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Airworthiness certificate: Standard, Normal - Destination: Same as departure - Airport: 7S3, Stark's Twin Oaks Airport, runway 02, 2,465 × 48 ft, asphalt - Equipment: Electronic flight bag or handheld device ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; student; medical: class 3, without waivers/limitations; seat: left; restraint: lap only; flight hours: 36 total, 5 in this make and model, 7 as pilot in command, 5 in the last 90 days, 1 in the last 30 days - Flight instructor; age 74; injuries: none; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, with waivers/limitations; last flight review April 22, 2022; seat: right; restraint: lap only; flight hours: 8,420 total, 45 in this make and model, 7,646 as pilot in command, 130 in the last 90 days, 74 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: 91 °F, dew point 55 °F - Altimeter: 29.90 inHg - Observed at: KHIO, 7 nm away - METAR: KHIO 262353Z 00000KT 10SM CLR 33/13 A2990 RMK AO2 SLP121 T03280133 10328 20233 56012 ## 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 20230826012499A](https://openairdocs.org/incident/20230826012499A), Aug 26, 2023: Luscombe 8A, Hillsboro, OR, Substantial damage. At 1710 PST on 08/26/2023 landing on runway 02 at Twin Oaks airport (7S3), Hillsboro, OR making a full stop landing, the aircraft a Luscombe A8 [privacy data… ## Docket (3 files) The files NTSB released with the investigation on April 19, 2024, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=192969. 4.8 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 student pilot (item 1, PDF, 11 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16237592&FileExtension=pdf&FileName=WPR23LA328%20N28841%206120%20flatted_Redacted-Rel.pdf - Pilot/operator aircraft accident report, NTSB form 6120.1 instructor (item 2, PDF, 11 pages, 2.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16237162&FileExtension=pdf&FileName=WPR23LA328%20N28841%206120%20Instructor%20flatted_Redacted-Rel.pdf - Photos (item 3, PDF, 1 page, 590 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16237401&FileExtension=pdf&FileName=WPR23LA328%20Photo-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.