{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":13,"name":"Aero","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/aero"}],"relation":"is a"},{"group":"Engine","items":[{"count":6,"name":"Superior Air Parts XP-O-360B1AC2","note":"180 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/superior-air-parts-xp-o-360b1ac2"}],"relation":"powered by"},{"group":"Place","items":[{"count":287,"name":"Spokane, WA","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Felts Field","note":"SFF","unit":"","url":"https://eflight.com/airports/SFF"},{"count":null,"name":"Spokane International","note":"GEG","unit":"","url":"https://eflight.com/airports/GEG"},{"count":10571,"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/N121U#records-check"}],"relation":"involved in"},{"group":"Live","items":[{"count":null,"name":"Where N121U is now","note":"","unit":"","url":"https://eflight.com/live?q=N121U"}],"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":"N121U","maker":"Aero","model":"C-104","name":"Aero C-104 N121U","state":"WA","type":"aircraft","url":"https://eflight.com/aircraft/N121U","year_built":1947},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}