{"as_of":"2026-11-12","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":37,"name":"Quad City Ultralight Acft Corp CHALLENGER II","note":"","unit":"registered","url":"https://eflight.com/models/quad-city-ultralight-acft-corp/challenger-ii"},{"count":54,"name":"Quad City Ultralight Acft Corp","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/quad-city-ultralight-acft-corp"},{"count":null,"name":"Built of aluminium tube and fabric","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/tube-fabric"}],"relation":"is a"},{"group":"Engine","items":[{"count":449,"name":"Rotax 503 series","note":"52 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/rotax-503-series"}],"relation":"powered by"},{"group":"Place","items":[{"count":177,"name":"Rochester, NY","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Frederick Douglass/Greater Rochester International","note":"ROC","unit":"","url":"https://eflight.com/airports/ROC"},{"count":6659,"name":"New York","note":"","unit":"aircraft registered","url":"https://eflight.com/states/NY"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"Accident on July 7, 2002 at Waco, TX: no injuries, substantial damage","note":"","unit":"","url":"https://eflight.com/accidents/FTW02LA201"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":null,"name":"Report filed on this aircraft: Plug, missing","note":"1995-10-20","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Quad City Ultralight Acft Corp CHALLENGER II","note":"","unit":"","url":"https://eflight.com/models/quad-city-ultralight-acft-corp/challenger-ii#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N61439 is now","note":"","unit":"","url":"https://eflight.com/live?q=N61439"}],"relation":"seen at"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"inherited_from_model":true,"material":"tube-fabric","name":"aluminium tube and fabric","note":"An ultralight-style airframe: bolted aluminium tubing under sailcloth."},"id":"N61439","maker":"Quad City Ultralight Acft Corp","model":"CHALLENGER II","name":"Quad City Ultralight Acft Corp CHALLENGER II N61439","state":"NY","type":"aircraft","url":"https://eflight.com/aircraft/N61439","year_built":null},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}