{"as_of":"2026-10-23","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":217,"name":"Hiller UH-12","note":"","unit":"registered","url":"https://eflight.com/models/hiller/uh-12"},{"count":242,"name":"Hiller","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/hiller"},{"count":null,"name":"Built of steel tube and aluminium","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/steel-aluminium"}],"relation":"is a"},{"group":"Engine","items":[{"count":84,"name":"Franklin 6V4 series","note":"210 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/franklin-6v4-series"},{"count":null,"name":"Type certificate 6H1","note":"held by Siam Hiller Holdings INC","unit":"","url":""}],"relation":"powered by"},{"group":"Place","items":[{"count":5,"name":"Olustee, OK","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Olustee Municipal","note":"F09","unit":"","url":"https://eflight.com/airports/F09"},{"count":5650,"name":"Oklahoma","note":"","unit":"aircraft registered","url":"https://eflight.com/states/OK"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"Accident on June 29, 2013 at Florence, AL: serious injuries, substantial damage","note":"","unit":"","url":"https://eflight.com/accidents/ERA13LA308"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":60,"name":"FAA orders naming the Hiller UH-12","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/hiller/uh-12#airworthiness"},{"count":65,"name":"Failure reports filed on the Hiller UH-12","note":"","unit":"reports since 1995","url":"https://eflight.com/models/hiller/uh-12#airworthiness"},{"count":112,"name":"Approved modifications for the Hiller UH-12","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/hiller/uh-12#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Hiller UH-12","note":"","unit":"","url":"https://eflight.com/models/hiller/uh-12#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 N6331D is now","note":"","unit":"","url":"https://eflight.com/live?q=N6331D"}],"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":"steel-aluminium","name":"steel tube and aluminium","note":null},"id":"N6331D","maker":"Hiller","model":"UH-12A","name":"Hiller UH-12A N6331D","state":"OK","type":"aircraft","url":"https://eflight.com/aircraft/N6331D","year_built":null},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
