# NTSB CEN24LA198: Brant T Phillips Super Cub EXP, N983SB, Franktown, CO, May 26, 2024 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: May 26, 2024, 10:00 local (16:00 UTC) - Place: Franktown, CO - Coordinates: 39.390334, -104.7524 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.3903&lon=-104.7524&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern final: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: FAA - NTSB case key (mKey): 194328 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN24LA198 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/194328/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=194328 - Page: https://openairdocs.org/ntsb/CEN24LA198 ## Probable cause The pilot’s failure to maintain aircraft control during final approach and attempted go-around after encountering a sudden windshear. ## 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: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05642CV), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Wind: windshear](https://openairdocs.org/ntsb-findings/03034020): Environmental issues › Conditions/weather/phenomena · Response/compensation (probable cause); cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-findings/03034020/cases.md?model=05642CV), [All aircraft, 90 cases](https://openairdocs.org/ntsb-findings/03034020/cases.md) - [Performance/control parameters: descent rate](https://openairdocs.org/ntsb-findings/01062037): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-findings/01062037/cases.md?model=05642CV), [All aircraft, 242 cases](https://openairdocs.org/ntsb-findings/01062037/cases.md) - [Wind: windshear](https://openairdocs.org/ntsb-findings/03034020): Environmental issues › Conditions/weather/phenomena · Effect on operation; cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-findings/03034020/cases.md?model=05642CV), [All aircraft, 90 cases](https://openairdocs.org/ntsb-findings/03034020/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR pattern final: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-events/240/sequence.md?model=05642CV), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) - [Approach-VFR go-around: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-events/060/sequence.md?model=05642CV), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Approach-VFR go-around: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Brant T Phillips SUPER CUB EXP, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05642CV), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot was attempting to land at his private airstrip when the airplane encountered an unexpected “windshear” and a greater than anticipated descent rate. The pilot attempted a go-around; however, the airplane was unable to sufficiently climb before it impacted a fence pole adjacent to the grass airstrip. The airplane came to rest upright and sustained substantial damage to the fuselage and left elevator control surface. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation and that he should have utilized better energy management given the wind conditions. ## Aircraft - Registration: [N983SB](https://openairdocs.org/aircraft/N983SB), registered now, S/N 001, built 2024 (OpenAirDocs) - Reported make and model: Brant T Phillips Super Cub EXP - Registry model: [Brant T Phillips SUPER CUB EXP](https://openairdocs.org/model/brant-t-phillips-super-cub-exp) (registry code 05642CV) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 001 - Year built: 2024 - Airframe hours: 55.1 - Engines: Lycoming IO-360 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: COS, Colorado Springs, CO - Destination: Same as departure - Airport: PVT, Pvt - Equipment: ADS-B, Auto-pilot, Onboard weather ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: none; private, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review August 24, 2023; seat: front; restraint: 5-point; flight hours: 1,184 total, 27 in this make and model, 1,169 as pilot in command, 36 in the last 90 days, 11 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 19 knots - Visibility: 10 statute miles - Temperature: 63 °F, dew point 28 °F - Altimeter: 29.96 inHg - Observed at: KAPA, 11 nm away - METAR: KAPA 261653Z 33017G27KT 10SM FEW060 FEW180 17/M02 A2996 RMK AO2 PK WND 33031/1625 SLP109 T01671022 ## 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 20240526005829A](https://openairdocs.org/incident/20240526005829A), May 26, 2024: Brant T Phillips SUPER CUB EXP, Franktown, CO, Substantial damage. PIC was flying from cos to their property for landing. In airplane avionics reported winds were quartering headwind. PIC attempted to land encountered sinking… ## Docket (2 files) The files NTSB released with the investigation on July 2, 2024, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=194328. 2.1 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 8 pages, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17195497&FileExtension=pdf&FileName=NTSB%20Report%20-%20N983SB%201_Redacted-Rel.pdf - Investigation photograph (item 2, PDF, 2 pages, 779 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17194852&FileExtension=pdf&FileName=Photo%20Array-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.