{"as_of":"2026-10-27","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":10,"name":"Keystone Helicopter S-76","note":"","unit":"registered","url":"https://eflight.com/models/keystone-helicopter/s-76"}],"relation":"makes"},{"group":"Engines","items":[{"count":9,"name":"Turbomeca (Safran) ARRIEL 2S2","note":"817 hp","unit":"of these aircraft","url":"https://eflight.com/engines/turbomeca-safran-arriel-2s2"}],"relation":"powered by"},{"group":"Type certificates","items":[{"count":null,"name":"Sikorsky Aircraft CORP","note":"holds the FAA type certificates","unit":"","url":""}],"relation":"held by"},{"group":"Where they are","items":[{"count":4,"name":"Louisiana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/LA"},{"count":2,"name":"Connecticut","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CT"},{"count":1,"name":"New York","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NY"},{"count":1,"name":"Nevada","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NV"},{"count":1,"name":"Delaware","note":"","unit":"of these aircraft","url":"https://eflight.com/states/DE"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":2,"name":"Arrow Aviation CO LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/arrow-aviation-co-llc"},{"count":1,"name":"Phi Health LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/phi-health-llc"},{"count":1,"name":"Phi Aviation LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/phi-aviation-llc"},{"count":1,"name":"Mustang Leasing LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/mustang-leasing-llc"}],"relation":"owned by"},{"group":"Analytics","items":[{"count":null,"name":"Biggest makers and model families","note":"","unit":"","url":"https://eflight.com/analytics/makers"},{"count":null,"name":"Accidents by model and by maker","note":"","unit":"","url":"https://eflight.com/analytics/accidents-by-model"}],"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":{"id":"keystone-helicopter","name":"Keystone Helicopter","registered":10,"type":"maker","url":"https://eflight.com/makers/keystone-helicopter"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}