{"as_of":"2026-10-26","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Design","items":[{"count":2,"name":"Robinson","note":"","unit":"aircraft on the register","url":"https://eflight.com/makers/robinson"},{"count":1382,"name":"Robinson R44 II","note":"","unit":"registered","url":"https://eflight.com/models/robinson/r44?variant=R44 II"},{"count":551,"name":"Robinson R44","note":"","unit":"registered","url":"https://eflight.com/models/robinson/r44?variant=R44"},{"count":6,"name":"Robinson R44 ASTRO","note":"","unit":"registered","url":"https://eflight.com/models/robinson/r44?variant=R44 ASTRO"},{"count":null,"name":"Type certificate H11NM","note":"held by Robinson Helicopter CO","unit":"","url":""},{"count":null,"name":"Built of steel tube and aluminium","note":"A welded steel-tube frame under aluminium and fibreglass skins; metal rotor blades.","unit":"","url":"https://eflight.com/materials/steel-aluminium"}],"relation":"made by"},{"group":"Engines","items":[{"count":1043,"name":"Lycoming IO-540-AE1A5","note":"260 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-io-540-ae1a5"},{"count":299,"name":"Lycoming O-540-F1B5","note":"260 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-o-540-f1b5"},{"count":295,"name":"Lycoming IO-540 series","note":"300 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-io-540-series"},{"count":138,"name":"Lycoming O-540 series","note":"250 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-o-540-series"},{"count":92,"name":"Lycoming O-540F1 SERIE","note":"260 hp","unit":"of these aircraft","url":"https://eflight.com/engines/lycoming-o-540f1-serie"}],"relation":"powered by"},{"group":"Where they are","items":[{"count":300,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":149,"name":"Delaware","note":"","unit":"of these aircraft","url":"https://eflight.com/states/DE"},{"count":142,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"},{"count":141,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":118,"name":"Alaska","note":"","unit":"of these aircraft","url":"https://eflight.com/states/AK"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":32,"name":"Spitzer Helicopter LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/spitzer-helicopter-llc"},{"count":28,"name":"Robinson Helicopter CO","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/robinson-helicopter-co"},{"count":21,"name":"Emerald City Aircraft Leasing INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/emerald-city-aircraft-leasing-inc"},{"count":20,"name":"Southern Utah University","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/southern-utah-university"},{"count":20,"name":"November Alpha LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/november-alpha-llc"}],"relation":"owned by"},{"group":"Record","items":[{"count":481,"name":"NTSB accidents and incidents involving the R44","note":"180 fatal","unit":"cases since 1982","url":"https://eflight.com/models/robinson/r44#accidents"},{"count":114,"name":"FAA filings this year on these aircraft","note":"70 bill of sale, 33 loan release, 8 loan or lien","unit":"filings","url":""}],"relation":"involved in"},{"group":"Airworthiness","items":[{"count":42,"name":"FAA orders naming the R44","note":"","unit":"airworthiness directives","url":"https://eflight.com/models/robinson/r44#airworthiness"},{"count":1407,"name":"Failure reports filed on the R44","note":"","unit":"reports since 1995","url":"https://eflight.com/models/robinson/r44#airworthiness"},{"count":110,"name":"Approved modifications for the R44","note":"","unit":"supplemental type certificates","url":"https://eflight.com/models/robinson/r44#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":"steel-aluminium","name":"steel tube and aluminium","note":"A welded steel-tube frame under aluminium and fibreglass skins; metal rotor blades."},"id":"robinson/r44","name":"Robinson R44","registered":1939,"type":"model","url":"https://eflight.com/models/robinson/r44","versions":3},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}