{"as_of":"2026-11-04","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":1,"name":"Delacey William H","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/delacey-william-h"}],"relation":"is a"},{"group":"Engine","items":[{"count":19,"name":"Lycoming YO-233","note":"115 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/lycoming-yo-233"}],"relation":"powered by"},{"group":"Owner","items":[{"count":1,"name":"Sill Aviation LLC","note":"","unit":"aircraft registered to this organisation","url":"https://eflight.com/search?q=Sill Aviation LLC"}],"relation":"owned by"},{"group":"Place","items":[{"count":19,"name":"O Fallon, IL","note":"","unit":"aircraft registered in this town","url":""},{"count":8065,"name":"Illinois","note":"","unit":"aircraft registered","url":"https://eflight.com/states/IL"}],"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/N721WD#records-check"}],"relation":"involved in"},{"group":"Live","items":[{"count":null,"name":"Where N721WD is now","note":"","unit":"","url":"https://eflight.com/live?q=N721WD"}],"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":"N721WD","maker":"Delacey William H","model":"RV9A","name":"Delacey William H RV9A N721WD","state":"IL","type":"aircraft","url":"https://eflight.com/aircraft/N721WD","year_built":2014},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}