{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":12,"name":"Quad City CHALLENGER II","note":"","unit":"registered","url":"https://eflight.com/models/quad-city/challenger-ii"}],"relation":"makes"},{"group":"Engines","items":[{"count":5,"name":"Rotax 503 series","note":"52 hp","unit":"of these aircraft","url":"https://eflight.com/engines/rotax-503-series"},{"count":4,"name":"Rotax 503 DCDI","note":"52 hp","unit":"of these aircraft","url":"https://eflight.com/engines/rotax-503-dcdi"},{"count":2,"name":"Hirth 2703","note":"55 hp","unit":"of these aircraft","url":"https://eflight.com/engines/hirth-2703"},{"count":1,"name":"Rotax 447","note":"40 hp","unit":"of these aircraft","url":"https://eflight.com/engines/rotax-447"},{"count":1,"name":"Rotax 503ULDCDI","note":"52 hp","unit":"of these aircraft","url":"https://eflight.com/engines/rotax-503uldcdi"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":3,"name":"Oklahoma","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OK"},{"count":2,"name":"Tennessee","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TN"},{"count":2,"name":"New York","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NY"},{"count":2,"name":"Missouri","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MO"},{"count":2,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"}],"relation":"registered in"},{"group":"Record","items":[{"count":27,"name":"NTSB accidents and incidents involving Quad City aircraft","note":"as the NTSB spells the maker's name","unit":"cases since 1982","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"},{"count":null,"name":"Accidents by model and by maker","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"id":"quad-city","name":"Quad City","registered":19,"type":"maker","url":"https://eflight.com/makers/quad-city"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}