# NTSB ERA11CA045: Evolution Revo, N611TX, Gransonville, MD, October 10, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: October 10, 2010, 18:00 local (22:00 UTC) - Place: Gransonville, MD - Coordinates: 38.93, -76.199996 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.9300&lon=-76.2000&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Defining event: [Approach-VFR go-around: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report March 16, 2011 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 77694 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA11CA045 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/77694/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=77694 - Page: https://openairdocs.org/ntsb/ERA11CA045 ## Probable cause The pilot's improper recovery from a bounced landing and the certificated flight instructor's inadequate remedial action, which resulted in an aerodynamic stall during a go-around. ## 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: [Evolution Trikes REVO, 4 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=060007Z), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md) - [Action: incomplete action](https://openairdocs.org/ntsb-findings/02041040): Personnel issues › Action/decision · Instructor/check pilot (probable cause); cases with it: [Evolution Trikes REVO, 1 case](https://openairdocs.org/ntsb-findings/02041040/cases.md?model=060007Z), [All aircraft, 105 cases](https://openairdocs.org/ntsb-findings/02041040/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090); cases with it: [Evolution Trikes REVO, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=060007Z), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Approach-VFR go-around: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241) (defining event); cases with it: [Evolution Trikes REVO, 2 cases](https://openairdocs.org/ntsb-events/241/sequence.md?model=060007Z), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md) - [Uncontrolled descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Evolution Trikes REVO, 5 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=060007Z), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis According to the certificated flight instructor (CFI), he was giving instruction to another pilot who was not rated in special light sport weight-shift airplanes. During touchdown, the airplane bounced and the CFI instructed the pilot undergoing instruction (PUI) to perform a go-around. The PUI pushed the control bar and the airplane stalled. The airplane to roll to the left and the left wingtip contacted the ground, resulting in the airplane tumbling in a cartwheel-type movement. The CFI stated that the PUI was seated in the rear seat and therefore had more leverage than his controls. Postaccident examination by a Federal Aviation Administration inspector revealed damage was sustained to fuselage structure. ## Factual narrative According to the flight instructor, he was giving flight instruction to another pilot who was not rated in special light sport weight-shift airplanes. The pilot receiving instruction was flying the airplane at the time of the accident from the front seat, with the flight instructor in the rear seat. Upon landing, the airplane bounced and when the flight instructor called for a go-around, the pilot receiving instruction pushed the control bar "out too far," causing the airplane to stall. The stall caused the airplane to roll to the left, touch the left wingtip to the ground, and the airplane cartwheeled. The flight instructor stated that the pilot receiving instruction had more leverage than the rear seat pilot's "instructor bars." Postaccident examination by a Federal Aviation Administration inspector revealed substantial damage to the entire fuselage. ## Aircraft - Registration: [N611TX](https://openairdocs.org/deregistered/N611TX-2012-01-27), registration cancelled 2012-01-27, S/N 000554, built 2010 (OpenAirDocs) - Reported make and model: Evolution Revo - Registry model: [Evolution Trikes REVO](https://openairdocs.org/model/evolution-trikes-revo) (registry code 060007T) (OpenAirDocs) - Registry engine: [Rotax 912UL series](https://openairdocs.org/engine/rotax-912ul-series) (registry code 55571, 4 cycle) (OpenAirDocs) - Category: Weight-shift - Serial number: 554 - Airframe hours: 52 - Engines: Rotax 912UL 80 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: DOJ/Sherrif's Association - Registered owner: DOJ/Sherrif's Association - Airworthiness certificate: Special, Special light-sport (Special) - Last inspection: Unknown, April 1, 2010 - Departed: W29, Stevensville, MD - Destination: Gransonville, MD - Airport: NONE, Talisman Farm ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 56; injuries: none; private, flight instructor, sport pilot; airplane ratings: single-engine land, single-engine sea; medical: class 3, with waivers/limitations; last flight review June 24, 2010; seat: rear; flight hours: 1,627 total, 64 in this make and model, 1,588 as pilot in command, 113 in the last 90 days, 41 in the last 30 days, 2 in the last 24 hours - Pilot; age 23; injuries: none; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; last flight review October 9, 2009; seat: front; flight hours: 415 total, 5 in this make and model, 9 in the last 90 days, 5 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 220° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: 10,000 ft broken - Temperature: 73 °F, dew point 59 °F - Altimeter: 29.85 inHg - Observed at: ESN, 11 nm away ## 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 20101010049539A](https://openairdocs.org/incident/20101010049539A), Oct 10, 2010: Evolution T REVO, Stevensville, MD, Substantial damage. CFI was checking out another CFI in a weight shift aircraft. During a landing, the pilot decided to go around. After adding power the aircraft drifted off the… ## Docket (4 files) The files NTSB released with the investigation on December 3, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=77694. 1.3 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 386 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40339178&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Memorandum of Record-Weight Shift Flight Instructor (item 2, .PDF, 27 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40339336&FileExtension=.PDF&FileName=Memorandum%20of%20Record-Weight%20Shift%20Flight%20Instructor-Master.PDF - Weather Report (item 3, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40339751&FileExtension=.PDF&FileName=Weather%20Report-Master.PDF - Photo - Main Wreckage (Courtesy of FAA) (item 4, .PDF, 866 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40339276&FileExtension=.PDF&FileName=Photo%20-%20Main%20Wreckage%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.