{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":8,"name":"Fokker","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/fokker"}],"relation":"is a"},{"group":"Owner","items":[{"count":16,"name":"Owls Head Transportation Museum","note":"","unit":"aircraft in the fleet","url":"https://eflight.com/fleets/owls-head-transportation-museum"}],"relation":"owned by"},{"group":"Place","items":[{"count":24,"name":"Owls Head, ME","note":"","unit":"aircraft registered in this town","url":""},{"count":1427,"name":"Maine","note":"","unit":"aircraft registered","url":"https://eflight.com/states/ME"}],"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/N439FK#records-check"}],"relation":"involved in"},{"group":"Live","items":[{"count":null,"name":"Where N439FK is now","note":"","unit":"","url":"https://eflight.com/live?q=N439FK"}],"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":"N439FK","maker":"Fokker","model":"FOKKER C-4","name":"Fokker FOKKER C-4 N439FK","state":"ME","type":"aircraft","url":"https://eflight.com/aircraft/N439FK","year_built":1923},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}