{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":20,"name":"Tomark Aero Cz Sro VIPER SD-4","note":"","unit":"registered","url":"https://eflight.com/models/tomark-aero-cz-sro/viper-sd-4"},{"count":20,"name":"Tomark Aero Cz Sro","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/tomark-aero-cz-sro"},{"count":null,"name":"Built of aluminium","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/aluminium"}],"relation":"is a"},{"group":"Engine","items":[{"count":208,"name":"Rotax 912ULS2","note":"100 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/rotax-912uls2"}],"relation":"powered by"},{"group":"Owner","items":[{"count":3,"name":"Management Ranch LLC","note":"","unit":"aircraft registered to this organisation","url":"https://eflight.com/search?q=Management Ranch LLC"}],"relation":"owned by"},{"group":"Place","items":[{"count":437,"name":"Sheridan, WY","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Sheridan County","note":"SHR","unit":"","url":"https://eflight.com/airports/SHR"},{"count":3236,"name":"Wyoming","note":"","unit":"aircraft registered","url":"https://eflight.com/states/WY"}],"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/N447EA#records-check"}],"relation":"involved in"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Tomark Aero Cz Sro VIPER SD-4","note":"","unit":"","url":"https://eflight.com/models/tomark-aero-cz-sro/viper-sd-4#accidents"},{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"relation":"compared in"},{"group":"Live","items":[{"count":null,"name":"Where N447EA is now","note":"","unit":"","url":"https://eflight.com/live?q=N447EA"}],"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":{"inherited_from_model":true,"material":"aluminium","name":"aluminium","note":null},"id":"N447EA","maker":"Tomark Aero Cz Sro","model":"VIPER SD-4","name":"Tomark Aero Cz Sro VIPER SD-4 N447EA","state":"WY","type":"aircraft","url":"https://eflight.com/aircraft/N447EA","year_built":2023},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}