{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":7,"name":"Quad City Ultralight CHALLENGER II","note":"","unit":"registered","url":"https://eflight.com/models/quad-city-ultralight/challenger-ii"},{"count":12,"name":"Quad City Ultralight","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/quad-city-ultralight"},{"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":"Place","items":[{"count":8,"name":"Zolfo Springs, FL","note":"","unit":"aircraft registered in this town","url":""},{"count":21706,"name":"Florida","note":"","unit":"aircraft registered","url":"https://eflight.com/states/FL"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"Accident on June 12, 2007 at Lodi, CA: no injuries, substantial damage","note":"","unit":"","url":"https://eflight.com/accidents/SEA07LA155"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Quad City Ultralight CHALLENGER II","note":"","unit":"","url":"https://eflight.com/models/quad-city-ultralight/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 N204DC is now","note":"","unit":"","url":"https://eflight.com/live?q=N204DC"}],"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":"N204DC","maker":"Quad City Ultralight","model":"CHALLENGER II","name":"Quad City Ultralight CHALLENGER II N204DC","state":"FL","type":"aircraft","url":"https://eflight.com/aircraft/N204DC","year_built":null},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}