# NTSB WPR22LA112: Gregory S Miller GM CUB, N9013F, Monument, OR, February 26, 2022 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Class 4 · Limited · Final report - Date: February 26, 2022, 13:00 local (21:00 UTC) - Place: Monument, OR · Open field - Coordinates: 44.916738, -119.40009 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.9167&lon=-119.4001&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: Minor injuries - Injuries: 1 minor, 1 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): 104706 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR22LA112 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/104706/pdf - Page: https://openairdocs.org/ntsb/WPR22LA112 ## Probable cause The failure of the pilot to maintain directional control during takeoff, which resulted in an impact with a tree. ## 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: [Gregory S Miller GM CUB, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05634KY), [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: [Gregory S Miller GM CUB, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05634KY), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Object/animal/substance: tree(s)](https://openairdocs.org/ntsb-findings/03022020): Environmental issues › Physical environment · Effect on equipment; cases with it: [Gregory S Miller GM CUB, 1 case](https://openairdocs.org/ntsb-findings/03022020/cases.md?model=05634KY), [All aircraft, 933 cases](https://openairdocs.org/ntsb-findings/03022020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Gregory S Miller GM CUB, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05634KY), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot of the tailwheel equipped airplane reported that, prior to takeoff, he had the airplane positioned perpendicular to the direction of takeoff. During takeoff, when he added power and attempted to turn and align the airplane with the runway, he lost directional control. Subsequently, the airplane ground looped and struck a tree with the right wing, which resulted in substantial damage. The pilot reported that there were no preaccident malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N9013F](https://openairdocs.org/aircraft/N9013F), registered now, S/N JA1805121 (OpenAirDocs) - Reported make and model: GREGORY S MILLER GM CUB (NO SERIES) - Registry model: [Gregory S Miller GM CUB](https://openairdocs.org/model/gregory-s-miller-gm-cub) (registry code 05634KY) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: JA1805121 - Year built: 2020 - Airframe hours: 140 - Engines: Lycoming O-320-A2B 160 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, August 1, 2021 - Departed: Monument, OR - Destination: TTD, Portland, OR - Airport: Private strip, runway 28, 600 × 75 ft, grass/turf - Equipment: Handheld GPS, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 58; injuries: none; commercial; airplane ratings: single-engine land, single-engine sea; instrument ratings: airplane; medical: class 3, without waivers/limitations; last flight review December 18, 2021; seat: front; restraint: 3-point; flight hours: 3,805 total, 1,105 in this make and model, 3,755 as pilot in command, 40 in the last 90 days, 16 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 100° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 39 °F, dew point 18 °F - Altimeter: 30.30 inHg - Observed at: KGCD, 36 nm away - METAR: KGCD 262055Z AUTO 10007KT 10SM CLR 04/M08 A3030 RMK A02 T00351081 ## 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 20220226003619A](https://openairdocs.org/incident/20220226003619A), Feb 26, 2022: Gregory S Miller GM CUB, Monument, OR, Substantial damage. The aircraft hit a tree on takeoff after a failed ground loop recovery attempt. 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.