{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":5,"name":"Saint Louis","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/saint-louis"}],"relation":"is a"},{"group":"Engine","items":[{"count":15,"name":"Ken Royce 90-5 series","note":"90 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/ken-royce-90-5-series"}],"relation":"powered by"},{"group":"Owner","items":[{"count":148,"name":"Western Antique Aeroplane & Automobile Museum","note":"","unit":"aircraft in the fleet","url":"https://eflight.com/fleets/western-antique-aeroplane-automobile-museum"}],"relation":"owned by"},{"group":"Place","items":[{"count":337,"name":"Hood River, OR","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Ken Jernstedt Airfield","note":"4S2","unit":"","url":"https://eflight.com/airports/4S2"},{"count":7013,"name":"Oregon","note":"","unit":"aircraft registered","url":"https://eflight.com/states/OR"}],"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/N31H#records-check"}],"relation":"involved in"},{"group":"Live","items":[{"count":null,"name":"Where N31H is now","note":"","unit":"","url":"https://eflight.com/live?q=N31H"}],"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":"N31H","maker":"Saint Louis","model":"CARDINAL C2","name":"Saint Louis CARDINAL C2 N31H","state":"OR","type":"aircraft","url":"https://eflight.com/aircraft/N31H","year_built":1929},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}