{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":3079,"name":"Bell","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/bell"},{"count":289,"name":"Bell UH-1H","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1H"},{"count":42,"name":"Bell UH-1B","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1B"},{"count":24,"name":"Bell UH-1N","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1N"},{"count":10,"name":"Bell UH-1D","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1D"},{"count":10,"name":"Bell UH-1V","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1V"},{"count":6,"name":"Bell UH-1E","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1?variant=UH-1E"},{"count":null,"name":"7 more versions","note":"","unit":"","url":"https://eflight.com/models/bell/uh-1#versions"},{"count":null,"name":"Type certificate H4NM","note":"held by Bell Helicopter Textron INC","unit":"","url":""},{"count":null,"name":"Built of aluminium","note":"","unit":"","url":"https://eflight.com/materials/aluminium"}],"relation":"made by"},{"group":"Engines","items":[{"count":46,"name":"Lycoming T53-L-13","note":"1400 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-t53-l-13"},{"count":34,"name":"Lycoming T-53","note":"1150 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-t-53"},{"count":18,"name":"Honeywell T53-L13B","note":"1100 hp","unit":"of these aircraft","url":"https://eflight.com/engines/honeywell-t53-l13b"},{"count":16,"name":"Lycoming T-53 series","note":"1150 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-t-53-series"},{"count":14,"name":"Lycoming T53-L-13B","note":"1400 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-t53-l-13b"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":70,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"},{"count":68,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":61,"name":"Washington","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WA"},{"count":30,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":21,"name":"Montana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MT"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":32,"name":"Usda Forest Service Fepp","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/usda-forest-service-fepp"},{"count":25,"name":"Northwest Helicopters LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/northwest-helicopters-llc"},{"count":16,"name":"Brown Helicopter INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/brown-helicopter-inc"},{"count":9,"name":"Northwest Helicopters INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/northwest-helicopters-inc"},{"count":8,"name":"Bell Textron INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/bell-textron-inc"}],"relation":"owned by"},{"group":"Record","items":[{"count":114,"name":"NTSB accidents and incidents involving the UH-1","note":"34 fatal","unit":"cases since 1982","url":"https://eflight.com/models/bell/uh-1#accidents"},{"count":6,"name":"FAA filings this year on these aircraft","note":"4 bill of sale, 2 loan release","unit":"filings","url":""}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":33,"name":"FAA orders naming the UH-1","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/bell/uh-1#airworthiness"},{"count":118,"name":"Failure reports filed on the UH-1","note":"","unit":"reports since 1995","url":"https://eflight.com/models/bell/uh-1#airworthiness"},{"count":31,"name":"Approved modifications for the UH-1","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/bell/uh-1#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":"bell/uh-1","name":"Bell UH-1 Huey (Iroquois)","registered":398,"type":"model","url":"https://eflight.com/models/bell/uh-1","versions":13},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
