{"as_of":"2026-10-29","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":26,"name":"Travel Air 4000","note":"","unit":"registered","url":"https://eflight.com/models/travel-air/4000"},{"count":87,"name":"Travel Air","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/travel-air"},{"count":null,"name":"Built of steel tube, wood and fabric","note":"as the model family is built; the register does not record it per aircraft","unit":"","url":"https://eflight.com/materials/steel-wood-fabric"}],"relation":"is a"},{"group":"Engine","items":[{"count":987,"name":"Continental W670 series","note":"250 hp","unit":"aircraft with this engine series","url":"https://eflight.com/engines/continental-w670-series"}],"relation":"powered by"},{"group":"Place","items":[{"count":102,"name":"Sanger, TX","note":"","unit":"aircraft registered in this town","url":""},{"count":null,"name":"Flying C Airport","note":"T87","unit":"","url":"https://eflight.com/airports/T87"},{"count":null,"name":"Ironhead Airport","note":"T58","unit":"","url":"https://eflight.com/airports/T58"},{"count":null,"name":"Vultures Row Airport","note":"6X8","unit":"","url":"https://eflight.com/airports/6X8"},{"count":29943,"name":"Texas","note":"","unit":"aircraft registered","url":"https://eflight.com/states/TX"}],"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/N501V#records-check"}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":1,"name":"FAA orders naming the Continental W670 series","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/continental-w670-series#airworthiness"},{"count":8,"name":"Failure reports on the Continental W670 series","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/continental-w670-series#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accident history of the Travel Air 4000","note":"","unit":"","url":"https://eflight.com/models/travel-air/4000#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 N501V is now","note":"","unit":"","url":"https://eflight.com/live?q=N501V"}],"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-wood-fabric","name":"steel tube, wood and fabric","note":"A biplane of the 1920s and 1930s: steel-tube fuselage, wooden wings, fabric covering."},"id":"N501V","maker":"Travel Air","model":"4000","name":"Travel Air 4000 N501V","state":"TX","type":"aircraft","url":"https://eflight.com/aircraft/N501V","year_built":1929},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}