# NTSB CEN21LA023: Evolution Revolt, N912RE, Durango, CO, October 4, 2020 - Type: NTSB accident investigation - Classification: Accident · No injuries · Class 4 · Limited · Final report - Date: October 4, 2020, 10:30 local (16:30 UTC) - Place: Durango, CO - Coordinates: 37.142654, -107.76223 - Nearby events: https://openairdocs.org/map.md?lat=37.1427&lon=-107.7622&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing: Hard landing](https://openairdocs.org/ntsb-events/092) - 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): 102170 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN21LA023 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/102170/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=102170 - Page: https://openairdocs.org/ntsb/CEN21LA023 ## Probable cause The pilot’s loss of directional control during landing following a hard landing and failure of the right main tire. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: descent rate](https://openairdocs.org/ntsb-findings/01062037): Aircraft › Aircraft oper/perf/capability · Not attained/maintained; cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-findings/01062037/cases.md?model=06001BM), [All aircraft, 242 cases](https://openairdocs.org/ntsb-findings/01062037/cases.md) - [Landing gear system: wheel/ski/float](https://openairdocs.org/ntsb-findings/01023246): Aircraft › Aircraft systems · Failure (probable cause); cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-findings/01023246/cases.md?model=06001BM), [All aircraft, 48 cases](https://openairdocs.org/ntsb-findings/01023246/cases.md) - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Attain/maintain not possible (probable cause); cases with it: [Evolution REVOLT, 2 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=06001BM), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md) - [Action: incorrect action performance](https://openairdocs.org/ntsb-findings/02041015): Personnel issues › Action/decision · Pilot; cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-findings/02041015/cases.md?model=06001BM), [All aircraft, 1,386 cases](https://openairdocs.org/ntsb-findings/02041015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing: Hard landing](https://openairdocs.org/ntsb-events/092) (defining event); cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-events/092/sequence.md?model=06001BM), [All aircraft, 2,102 cases](https://openairdocs.org/ntsb-events/092/sequence.md) - [Landing-flare/touchdown: Sys/Comp malf/fail (non-power)](https://openairdocs.org/ntsb-events/330); cases with it: [Evolution REVOLT, 1 case](https://openairdocs.org/ntsb-events/330/sequence.md?model=06001BM), [All aircraft, 994 cases](https://openairdocs.org/ntsb-events/330/sequence.md) - [Landing-flare/touchdown: Loss of control on ground](https://openairdocs.org/ntsb-events/230); cases with it: [Evolution REVOLT, 2 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=06001BM), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) ## Analysis The pilot was landing the weight-shift control aircraft when the right main tire failed and he lost directional control. He reported that the landing was hard, but he had landed hard before without issues. The aircraft rolled onto its side, which resulted in substantial damage to the wing structure. The tire was disposed of before it could be examined, but photographs of the tire showed it had failed and split down the center groove. The pilot reported that there were no preaccident mechanical malfunctions or failures with the weight-shift control aircraft that would have precluded normal operation. ## Aircraft - Registration: [N912RE](https://openairdocs.org/aircraft/N912RE), registered now, S/N 001001, built 2017 (OpenAirDocs) - Reported make and model: Evolution 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: 001001 - Year built: 2017 - Airframe hours: 163.3 - Engines: Rotax 912 WLS 100 hp reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Special light-sport (Special) - Last inspection: Annual, May 1, 2020 - Departed: K00C, Durango, CO - Destination: Same as departure - Airport: KDRO, Durango-La Plata County Airport, runway 03, 9,201 × 150 ft, asphalt - Equipment: Airframe parachute, Electronic multifunction display ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 65; injuries: none; private; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: sport pilot, without waivers/limitations; last flight review May 25, 2020; seat: front; restraint: lap only; flight hours: 2,429 total, 1.5 in this make and model, 2,360 as pilot in command, 18.1 in the last 90 days, 15.2 in the last 30 days, 1.5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 10 statute miles - Temperature: 59 °F, dew point 18 °F - Altimeter: 30.16 inHg - Observed at: KDRO ## 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 20201004017119A](https://openairdocs.org/incident/20201004017119A), Oct 4, 2020: Evolution Aircraft Inc REVOLT, Durango, CO, Substantial damage. While landing on touchdown the aircraft veered strongly to the right. When the pilot tried to straighten the aircraft out it skidded left and overturned onto… ## Docket (3 files) The files NTSB released with the investigation on August 4, 2021, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=102170. 6.4 MB in all. - Pilot/operator aircraft accident report, NTSB form 6120.1 (item 1, PDF, 11 pages, 4.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11625873&FileExtension=pdf&FileName=6120_Redacted-Rel.pdf - Photos (item 2, PDF, 3 pages, 3 photos, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11625774&FileExtension=pdf&FileName=Photo%20Array-Rel.pdf - Record of conversation - pilot (item 3, PDF, 1 page, 119 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=11626155&FileExtension=pdf&FileName=Memo%20of%20Conversation%20-%20Pilot-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.