# NTSB CEN24LA355: Just SuperStol, N874FT, Mount Vernon, IA, September 12, 2024 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Class 4 · Limited · Final report - Date: September 12, 2024, 13:30 local (18:30 UTC) - Place: Mount Vernon, IA - Coordinates: 41.920756, -91.429363 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=41.9208&lon=-91.4294&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR go-around: Loss of control in flight](https://openairdocs.org/ntsb-events/240) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Central Region - Parties: FAA-FSDO - NTSB case key (mKey): 195113 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN24LA355 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/195113/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=195113 - Page: https://openairdocs.org/ntsb/CEN24LA355 ## Probable cause The pilot’s failure to maintain airplane control during a go-around which resulted in an aerodynamic stall and collision with terrain. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: lateral/bank control](https://openairdocs.org/ntsb-findings/01062023): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Mark A Anton JUST JA30 SUPERSTOL, 1 case](https://openairdocs.org/ntsb-findings/01062023/cases.md?model=05641HI), [All aircraft, 390 cases](https://openairdocs.org/ntsb-findings/01062023/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Mark A Anton JUST JA30 SUPERSTOL, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05641HI), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Mark A Anton JUST JA30 SUPERSTOL, 1 case](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=05641HI), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Approach-VFR go-around: Miscellaneous/other](https://openairdocs.org/ntsb-events/900); cases with it: [Mark A Anton JUST JA30 SUPERSTOL, 1 case](https://openairdocs.org/ntsb-events/900/sequence.md?model=05641HI), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md) - [Approach-VFR go-around: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Mark A Anton JUST JA30 SUPERSTOL, 1 case](https://openairdocs.org/ntsb-events/240/sequence.md?model=05641HI), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md) ## Analysis The pilot reported that during a go-around, the right-wing leading-edge slat retracted to the stowed position, and the airplane rolled to the right. The pilot attempted to correct with opposite aileron; however, the airplane continued the right roll and impacted the ground. The airplane sustained substantial damage to both wings, fuselage, and the empennage. According to the airplane kit manufacturer, the wing leading-edge slats are self-deploying and self-stowing. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N874FT](https://openairdocs.org/aircraft/N874FT), registered now, S/N JA529-09-18, built 2024 (OpenAirDocs) - Reported make and model: Just Aircraft SuperStol - Registry model: [Mark A Anton JUST JA30 SUPERSTOL](https://openairdocs.org/model/mark-a-anton-just-ja30-superstol) (registry code 05641HI) (OpenAirDocs) - Registry engine: [Rotax 915 IS series](https://openairdocs.org/engine/rotax-915-is-series) (registry code 55620, 4 cycle) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: JA529-09-18 - Year built: 2024 - Airframe hours: 45 - Engines: ROTAX 915 IS 141 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Unknown, May 16, 2024 - Departed: IA24, Oxford, IA - Destination: Same as departure - Airport: PVT, Private, runway UKN, 650 × 80 ft, grass/turf - Equipment: Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device, ADS-B ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: minor; flight engineer, airline transport, flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review March 1, 2024; seat: left; flight hours: 13,818 total, 15 in this make and model, 11,000 as pilot in command, 15 in the last 90 days, 15 in the last 30 days, 8 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 120° at 8 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 82 °F, dew point 61 °F - Altimeter: 30.04 inHg - Observed at: KCID, 13 nm away - METAR: KCID 121752Z 12008KT 10SM CLR 28/16 A3004 ## 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 20240912017489A](https://openairdocs.org/incident/20240912017489A), Sep 12, 2024: Mark A Anton JUST JA30 SUPERSTOL, Mount Vernon, IA, Substantial damage. During a left base turn to final to a private grass strip, the aircraft overshot its final approach path to landing. The aircraft's approach became unstable… ## Docket (2 files) The files NTSB released with the investigation on March 20, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=195113. 5.8 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 12 pages, 5.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=18095580&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photo array (item 2, PDF, 2 pages, 195 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=18095162&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.