# NTSB CEN10CA238: Ankerstar Bradley D RAND-ROBINSON KR2, N774A, Hamilton, OH, April 14, 2010 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: April 14, 2010, 13:00 local (17:00 UTC) - Place: Hamilton, OH - Coordinates: 39.364166, -84.521942 - Nearby events: https://openairdocs.org/map.md?lat=39.3642&lon=-84.5219&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Defining event: [Landing-flare/touchdown: Abnormal runway contact](https://openairdocs.org/ntsb-events/090) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 22, 2010 - Report: Approved by Office Director - NTSB office: Central Region - Parties: FAA-CVG FSDO - NTSB case key (mKey): 75938 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN10CA238 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/75938/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=75938 - Page: https://openairdocs.org/ntsb/CEN10CA238 ## Probable cause The pilot's improper flare resulting in a hard landing and collapsed landing gear. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Performance/control parameters: landing flare](https://openairdocs.org/ntsb-findings/01062041): Aircraft › Aircraft oper/perf/capability · Not attained/maintained (probable cause); cases with it: [Ankerstar Bradley D RAND-ROBINSON KR2, 1 case](https://openairdocs.org/ntsb-findings/01062041/cases.md?model=05622S0), [All aircraft, 1,285 cases](https://openairdocs.org/ntsb-findings/01062041/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) (defining event); cases with it: [Ankerstar Bradley D RAND-ROBINSON KR2, 1 case](https://openairdocs.org/ntsb-events/090/sequence.md?model=05622S0), [All aircraft, 1,506 cases](https://openairdocs.org/ntsb-events/090/sequence.md) - [Landing-flare/touchdown: Landing gear collapse](https://openairdocs.org/ntsb-events/094); cases with it: [Ankerstar Bradley D RAND-ROBINSON KR2, 1 case](https://openairdocs.org/ntsb-events/094/sequence.md?model=05622S0), [All aircraft, 1,787 cases](https://openairdocs.org/ntsb-events/094/sequence.md) ## Analysis The pilot reported that he was performing high speed taxi testing of his tailwheel-equipped amateur-built airplane. During one of the high speed taxi runs the airplane inadvertently became airborne. The pilot stated that he attempted to land, but then decided to go airborne. He stated that he climbed to an altitude of about 3,000 feet and flew for approximately 40 minutes before returning to land. He stated that during the landing he was fast because he was attempting a wheel landing. He said that the airplane bounced and the airplane came back down hard. The airplane's retractable main landing gear collapsed and the airplane skidded to a stop on its belly. Examination of the airplane revealed that the eight landing gear attach bolts had pulled loose from the wing structure. The landing gear penetrated through the upper surface of the wing. ## Factual narrative The pilot reported that he was performing high speed taxi testing of his tail wheel equipped amateur-built airplane. During one of the high speed taxi runs the airplane inadvertently became airborne. The pilot stated that he attempted to land but then decided to go airborne. He stated that he climbed to an altitude of about 3,000 feet and flew for approximately 40 minutes before returning to land. He stated that during the landing he was fast because he was attempting a wheel landing. He said that the airplane bounced and the airplane came back down hard. The airplane's retractable main landing gear collapsed and the airplane skidded to a stop on its belly. Examination of the airplane revealed that the eight landing gear attach bolts had pulled loose from the wing structure. The landing gear penetrated through the upper surface of the wing. ## Aircraft - Registration: [N774A](https://openairdocs.org/deregistered/N774A-2013-08-29), registration cancelled 2013-08-29, S/N 130 (OpenAirDocs) - Reported make and model: ANKERSTAR BRADLEY D RAND-ROBINSON KR2 - Registry model: [Ankerstar Bradley D RAND-ROBINSON KR2](https://openairdocs.org/model/ankerstar-bradley-d-rand-robinson-kr2) (registry code 05622S0) (OpenAirDocs) - Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 130 - Engines: VOLKSWAGEN CONVERSION 36 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Airworthiness certificate: Special, Experimental (Special) - Departed: HAO, Hamilton, OH - Destination: HAO, Hamilton, OH - Flight plan: Unknown - Airport: HAO, Butler County Regional Airport, runway 11, 5,500 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 74; injuries: none; commercial; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; seat: left; flight hours: 280 total, 1 in this make and model ## Weather - Conditions: Visual (VMC), Day ## 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 20100414004949A](https://openairdocs.org/incident/20100414004949A), Apr 14, 2010: Ankerstar B RAND-ROBINS, Hamilton, OH, Substantial damage. Pilot was operating a KR-2 aircraft at the Butler county regional airport. Pilot was doing high speed taxi testing. After 8 successful trips down the runway,… ## Other investigations on N774A (1) 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. - [NTSB CEN13LA304](https://openairdocs.org/ntsb/CEN13LA304), May 11, 2013: Ankestar, Bradley D. RAND-ROBINSON KR2 (N774A), Hamilton, OH, substantial damage. Probable cause: The loss of engine power due to vapor lock in the fuel system. Contributing to the accident was the operation of the airplane with automotive gasoline and the installation of noninsulated fuel… ## Docket (1 files) The files NTSB released with the investigation on May 18, 2010, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=75938. 316 KB in all. - Pilot Statement (item 1, .PDF, 316 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40329590&FileExtension=.PDF&FileName=Pilot%20Statement-Redacted.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.