# NTSB ERA22LA335: Evolution Revolt, N199KS, Calhoun, GA, July 25, 2022 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Class 4 · Limited · Final report - Date: July 25, 2022, 09:42 local (13:42 UTC) - Place: Calhoun, GA - Coordinates: 34.455388, -84.939166 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.4554&lon=-84.9392&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR pattern final: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed - Report: Approved by Office Director - Investigation class: Class 4 - Basic report with no Prelim publish - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 105578 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA22LA335 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/105578/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=105578 - Page: https://openairdocs.org/ntsb/ERA22LA335 ## Probable cause The pilot’s exceedance of the airplane’s critical angle of attack during the landing flare, which resulted in a loss of directional control, a runway excursion, and substantial damage to the airplane. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=06001BM), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md) - [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Evolution REVOLT, 4 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=06001BM), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/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: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) (defining event); cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-events/241/sequence.md?model=06001BM), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md) ## Analysis The pilot explained that during the 20-minute flight, the weight-shift airplane was “in good working order with no known problems.” He completed his final approach, and at 2-3 feet above the runway surface, the left wing “stalled.” The airplane rotated to its left, the left main landing gear touched the surface, which rotated the airplane further left, and just after the nose landing gear touched down, the airplane departed the runway to its left about “55 degrees” off the runway heading. The pilot “applied full power” to clear the drainage swale to the airplane’s front but was unsuccessful. The airplane passed through the swale and rolled onto its left side which resulted in a serious injury to the pilot’s ankle and substantial damage to the wing structure. The pilot repeated that there were no pre-accident mechanical anomalies with his airplane that precluded normal operation. ## Aircraft - Registration: [N199KS](https://openairdocs.org/aircraft/N199KS), registered now, S/N 001012, built 2018 (OpenAirDocs) - Reported make and model: EVOLUTION AIRCRAFT INC REVOLT - Registry model: [Evolution REVOLT](https://openairdocs.org/model/evolution-revolt) (registry code 06001BM) (OpenAirDocs) - Registry engine: [Rotax 912ULS series](https://openairdocs.org/engine/rotax-912uls-series) (registry code 55572, 4 cycle) (OpenAirDocs) - Category: Weight-shift - Serial number: 001012 - Year built: 2018 - Airframe hours: 371 - Engines: Rotax 912 ULS 100 hp reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Sutz Kenneth J - Registered owner: Sutz Kenneth J - Airworthiness certificate: Standard, Normal - Last inspection: Annual, January 2, 2022, 34 hours before - Departed: AND, Anderson, SC - Destination: Same as departure - Flight plan: VFR - Airport: CZL, Tom B David Fld, runway 25, 6,034 × 100 ft, asphalt - Equipment: Electronic multifunction display, Airframe parachute ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; injuries: serious; sport pilot, private; airplane ratings: single-engine land; medical: sport pilot, with waivers/limitations; last flight review April 13, 2022; seat: front; restraint: lap only; flight hours: 668 total, 271 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 81 °F, dew point 73 °F - Altimeter: 30.15 inHg - Observed at: KCZL - METAR: METAR KCZL 251355Z AUTO 20004KT 10SM CLR 27/23 A3015 RMK AO2 ## 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 20220725023179A](https://openairdocs.org/incident/20220725023179A), Jul 25, 2022: Evolution Aircraft Inc REVOLT, Calhoun, GA, Substantial damage. On July 25, 2022 at approximately 0952 an airman was flying a light sport aircraft (weight-shift) attempting to land at tom b. David field (czl) on runway 17,… ## Docket (2 files) The files NTSB released with the investigation on April 27, 2023, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=105578. 4.3 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14292318&FileExtension=pdf&FileName=NTSB%20Form%206120_Redacted-Rel.pdf - Photo array (item 2, PDF, 3 pages, 2.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=14293187&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.