# NTSB GAA18CA033: Evolution Revo, N401HK, Berlin, NH, October 29, 2017 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: October 29, 2017, 10:52 local (14:52 UTC) - Place: Berlin, NH - Coordinates: 44.574722, -71.175277 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=44.5747&lon=-71.1753&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 14, 2018 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 96270 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA18CA033 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/96270/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=96270 - Page: https://openairdocs.org/ntsb/GAA18CA033 ## Probable cause The pilot’s failure to center the ground steering before landing, which resulted in a loss of directional control. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Action: forgotten action/omission](https://openairdocs.org/ntsb-findings/02041035): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Evolution REVO, 2 cases](https://openairdocs.org/ntsb-findings/02041035/cases.md?model=060009B), [All aircraft, 440 cases](https://openairdocs.org/ntsb-findings/02041035/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: [Evolution REVO, 2 cases](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=060009B), [All aircraft, 3,958 cases](https://openairdocs.org/ntsb-findings/01062020/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 REVO, 8 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=060009B), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Object/animal/substance: sign/marker](https://openairdocs.org/ntsb-findings/03022015): Environmental issues › Physical environment · Effect on equipment; cases with it: [Evolution REVO, 1 case](https://openairdocs.org/ntsb-findings/03022015/cases.md?model=060009B), [All aircraft, 214 cases](https://openairdocs.org/ntsb-findings/03022015/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Evolution REVO, 3 cases](https://openairdocs.org/ntsb-events/230/sequence.md?model=060009B), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Evolution REVO, 7 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=060009B), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis The pilot of the weight-shift aircraft reported that he was practicing touch-and-go landings. When the aircraft touched down, it veered to the left because he did not have the ground steering centered before touchdown. The pilot initiated a go-around; however, the aircraft collided with an airport ramp sign. The weight-shift aircraft sustained substantial damage to the wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the weight-shift aircraft that would have precluded normal operation. ## Factual narrative The pilot of the weight-shift aircraft reported that he was practicing touch-and-go landings. When the aircraft touched down, it veered to the left because he did not have the ground steering centered before touchdown. The pilot initiated a go-around, however the aircraft collided with an airport ramp sign. The aircraft sustained substantial damage to the wing. The pilot reported that there were no preaccident mechanical malfunctions or failures with the gyroplane that would have precluded normal operation. ## Aircraft - Registration: [N401HK](https://openairdocs.org/aircraft/N401HK), registered now, S/N 000623, built 2017 (OpenAirDocs) - Reported make and model: EVOLUTION AIRCRAFT INC REVO (NO SERIES) - Registry model: [Evolution REVO](https://openairdocs.org/model/evolution-revo) (registry code 060009B) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Weight-shift - Serial number: 000623 - Year built: 2017 - Engines: Rotax ULS 100 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Special light-sport (Special) - Last inspection: Annual, May 1, 2017 - Departed: BML, Berlin, NH - Destination: BML, Berlin, NH - Airport: BML, Berlin Rgnl, runway 36, 5,200 × 100 ft, asphalt - Equipment: Electronic multifunction display, Airframe parachute ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 66; injuries: minor; private; airplane ratings: single-engine land; medical: sport pilot; last flight review October 6, 2017; seat: front; restraint: 3-point; flight hours: 657 total, 50 in the last 90 days, 40 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 140° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: 2,500 ft broken - Temperature: 55 °F, dew point 54 °F - Altimeter: 29.92 inHg - Observed at: KBML ## 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 20171029021839A](https://openairdocs.org/incident/20171029021839A), Oct 29, 2017: Evolution Aircraft, Inc REVO, Milan, NH, Substantial damage. On 10/29/2017, N401HK failed to maintain directional control after liftoff resulting in the aircraft striking a runway sign. The PIC was the sole occupant,… ## Docket (2 files) The files NTSB released with the investigation on April 19, 2018, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=96270. 990 KB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 628 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462042&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (Courtesy of FAA) (item 2, .PDF, 1 photo, 363 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40462043&FileExtension=.PDF&FileName=Accident%20Photo%20(Courtesy%20of%20FAA)-Master.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.