{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":1,"name":"O'Keefe John T","note":"","unit":"aircraft on the register","url":""}],"relation":"is a"},{"group":"Engine","items":[{"count":10,"name":"Solar T-62","note":"150 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/solar-t-62"}],"relation":"powered by"},{"group":"Place","items":[{"count":33,"name":"Winthrop, WA","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Methow Valley State Airport","note":"S52","unit":"","url":"https://eflight.com/airports/S52"},{"count":10644,"name":"Washington","note":"","unit":"aircraft registered","url":"https://eflight.com/states/WA"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"No NTSB accident or incident record under this tail number","note":"","unit":"","url":"https://eflight.com/aircraft/N537HC#records-check"}],"relation":"involved in"},{"group":"Live","items":[{"count":null,"name":"Where N537HC is now","note":"","unit":"","url":"https://eflight.com/live?q=N537HC"}],"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":null,"id":"N537HC","maker":"O'Keefe John T","model":"HELICYCLE","name":"O'Keefe John T HELICYCLE N537HC","state":"WA","type":"aircraft","url":"https://eflight.com/aircraft/N537HC","year_built":2014},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}