# NTSB GAA19CA047: Poberezny Acro Sport II, N44JS, Culpeper, VA, November 4, 2018 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: November 4, 2018, 14:30 local (19:30 UTC) - Place: Culpeper, VA - Coordinates: 38.525554, -77.859725 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.5256&lon=-77.8597&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 March 20, 2020 - Report: Approved by Office Director - NTSB office: General Aviation Accidents - Parties: FAA - NTSB case key (mKey): 98595 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=GAA19CA047 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/98595/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=98595 - Page: https://openairdocs.org/ntsb/GAA19CA047 ## Probable cause The pilot's failure to maintain directional control during landing, which resulted in a ground loop. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: directional control](https://openairdocs.org/ntsb-findings/01062020): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-findings/01062020/cases.md?model=05624BK), [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: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=05624BK), [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. - [Landing-landing roll: Loss of control on ground](https://openairdocs.org/ntsb-events/230) (defining event); cases with it: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-events/230/sequence.md?model=05624BK), [All aircraft, 4,585 cases](https://openairdocs.org/ntsb-events/230/sequence.md) - [Landing-landing roll: Attempted remediation/recovery](https://openairdocs.org/ntsb-events/060); cases with it: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-events/060/sequence.md?model=05624BK), [All aircraft, 1,422 cases](https://openairdocs.org/ntsb-events/060/sequence.md) - [Landing-landing roll: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-events/470/sequence.md?model=05624BK), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) - [Landing-landing roll: Roll over](https://openairdocs.org/ntsb-events/097); cases with it: [Stoops Hugh James ACRO SPORT II, 1 case](https://openairdocs.org/ntsb-events/097/sequence.md?model=05624BK), [All aircraft, 261 cases](https://openairdocs.org/ntsb-events/097/sequence.md) ## Analysis The pilot of the tailwheel-equipped airplane reported that, after a three-point landing, during the landing roll, the airplane veered left. He corrected with right rudder, but the airplane continued left. He added that he then "applied increasing right rudder" and that the airplane "turned sharply to the right and ground looped." The airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Factual narrative The pilot of the tailwheel equipped airplane reported that, after a 3-point landing, during the landing roll, the airplane veered left. He corrected with right rudder, but the airplane continued left. He then "applied increasing right rudder" and the airplane "turned sharply to the right and ground looped." The airplane sustained substantial damage to the right wing. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. ## Aircraft - Registration: [N44JS](https://openairdocs.org/aircraft/N44JS), registered now, S/N 4153 (OpenAirDocs) - Reported make and model: Poberezny ACRO SPORT II (2) - Registry model: [Stoops Hugh James ACRO SPORT II](https://openairdocs.org/model/stoops-hugh-james-acro-sport-ii) (registry code 05624BK) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 4153 - Year built: 1994 - Airframe hours: 428.27 - Engines: Lycoming HO-360B1B 180 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Condition, October 17, 2018 - Departed: CJR, Culpeper, VA - Destination: CJR, Culpeper, VA - Airport: CJR, Culpeper Rgnl, runway 04, 5,000 × 100 ft, asphalt - Equipment: None ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 58; injuries: none; private; airplane ratings: single-engine land; medical: basicmed; last flight review April 25, 2018; seat: rear; restraint: 5-point; flight hours: 1,024 total, 125 in this make and model, 959 as pilot in command, 3 in the last 90 days, 1 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 59 °F, dew point 34 °F - Altimeter: 30.45 inHg - Observed at: KCJR ## 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 20181104016989A](https://openairdocs.org/incident/20181104016989A), Nov 4, 2018: Stoops Hugh James ACRO SPORT II, Culpeper, VA, Substantial damage. Pilot was flying an homebuilt acrosport aircraft, which is a bi-wing tailwheeled aircraft. Pilot departed Culpeper on a refresher flight as pilot just… ## Docket (2 files) The files NTSB released with the investigation on December 10, 2019, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=98595. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478876&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Master.PDF - Accident Photo (item 2, .PDF, 124 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40478877&FileExtension=.PDF&FileName=Accident%20Photo-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.