{"as_of":"2026-11-10","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":861,"name":"Dehavilland","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/dehavilland"},{"count":59,"name":"Dehavilland DHC-6-300","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6-300"},{"count":26,"name":"Dehavilland DHC-6 TWIN OTTER","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6 TWIN OTTER"},{"count":19,"name":"Dehavilland DHC-6-200","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6-200"},{"count":6,"name":"Dehavilland DHC-6-100","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6-100"},{"count":3,"name":"Dehavilland DHC-6","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6"},{"count":1,"name":"Dehavilland DHC-6-310","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-6?variant=DHC-6-310"},{"count":null,"name":"Built of aluminium","note":"","unit":"","url":"https://eflight.com/materials/aluminium"}],"relation":"made by"},{"group":"Engines","items":[{"count":26,"name":"Pratt & Whitney PT6A series","note":"750 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-pt6a-series"},{"count":21,"name":"Pratt & Whitney Canada PT6A-27","note":"680 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-canada-pt6a-27"},{"count":14,"name":"Pratt & Whitney Canada PT6A-60A","note":"1050 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-canada-pt6a-60a"},{"count":10,"name":"Pratt & Whitney Canada PT6 series","note":"550 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-canada-pt6-series"},{"count":10,"name":"Pratt & Whitney PT6A-27","note":"680 hp","unit":"of these aircraft","url":"https://eflight.com/engines/pratt-whitney-pt6a-27"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":21,"name":"Nevada","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NV"},{"count":13,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":12,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":11,"name":"Montana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MT"},{"count":9,"name":"Washington","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WA"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":14,"name":"Twin Otter International LTD","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/twin-otter-international-ltd"},{"count":5,"name":"Ikhana Aircraft Holdings LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/ikhana-aircraft-holdings-llc"},{"count":5,"name":"Desert Sand Aircraft Leasing CO INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/desert-sand-aircraft-leasing-co-inc"},{"count":4,"name":"United States Department Of Commerce","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/united-states-department-of-commerce"},{"count":4,"name":"Landlocked Company LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/landlocked-company-llc"}],"relation":"owned by"},{"group":"Record","items":[{"count":7,"name":"NTSB accidents and incidents involving the DHC-6","note":"2 fatal","unit":"cases since 1982","url":"https://eflight.com/models/dehavilland/dhc-6#accidents"},{"count":13,"name":"FAA filings this year on these aircraft","note":"6 evidence of ownership with lien, 4 loan or lien, 3 loan release","unit":"filings","url":""}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":70,"name":"FAA orders naming the DHC-6","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/dehavilland/dhc-6#airworthiness"},{"count":956,"name":"Failure reports filed on the DHC-6","note":"","unit":"reports since 1995","url":"https://eflight.com/models/dehavilland/dhc-6#airworthiness"},{"count":312,"name":"Approved modifications for the DHC-6","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/dehavilland/dhc-6#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"Accidents by model, with rates per thousand registered","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"},{"count":null,"name":"The fleet by kind, state and age","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"built_of":{"material":"aluminium","name":"aluminium","note":null},"id":"dehavilland/dhc-6","name":"Dehavilland DHC-6","registered":114,"type":"model","url":"https://eflight.com/models/dehavilland/dhc-6","versions":6},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}