{"as_of":"2026-11-10","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":14,"name":"Cameron Balloons Us O-77","note":"","unit":"registered","url":"https://eflight.com/models/cameron-balloons-us/o-77"},{"count":715,"name":"Cameron Balloons Us","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/cameron-balloons-us"},{"count":null,"name":"Built of fabric and wicker","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/balloon"}],"relation":"is a"},{"group":"Place","items":[{"count":72,"name":"Ottumwa, IA","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Ottumwa Regional","note":"OTM","unit":"","url":"https://eflight.com/airports/OTM"},{"count":4513,"name":"Iowa","note":"","unit":"aircraft registered","url":"https://eflight.com/states/IA"}],"relation":"registered in"},{"group":"Record","items":[{"count":null,"name":"Accident on September 16, 2007 at Creston, IA: serious injuries, substantial damage","note":"","unit":"","url":"https://eflight.com/accidents/CHI07CA300"},{"count":null,"name":"Accident on September 27, 1992 at North Omaha, NE: serious injuries","note":"","unit":"","url":"https://eflight.com/accidents/CHI92LA293"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":7,"name":"Approved modifications for the Cameron Balloons Us O-77","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/cameron-balloons-us/o-77#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Cameron Balloons Us O-77","note":"","unit":"","url":"https://eflight.com/models/cameron-balloons-us/o-77#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 N9539G is now","note":"","unit":"","url":"https://eflight.com/live?q=N9539G"}],"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":"balloon","name":"fabric and wicker","note":null},"id":"N9539G","maker":"Cameron Balloons Us","model":"O-77","name":"Cameron Balloons Us O-77 N9539G","state":"IA","type":"aircraft","url":"https://eflight.com/aircraft/N9539G","year_built":1990},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}