{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":15,"name":"Bell 407","note":"","unit":"with this engine series","url":"https://eflight.com/models/bell/407"}],"relation":"powers"},{"group":"Where they are","items":[{"count":2,"name":"New York","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NY"},{"count":2,"name":"Missouri","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MO"},{"count":2,"name":"Louisiana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/LA"},{"count":2,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"},{"count":2,"name":"Arizona","note":"","unit":"of these aircraft","url":"https://eflight.com/states/AZ"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":2,"name":"Air Evac Ems INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/air-evac-ems-inc"},{"count":1,"name":"Vertol Systems Company INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/vertol-systems-company-inc"},{"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"}],"relation":"owned by"},{"group":"Airworthiness","items":[{"count":1403,"name":"Failure reports on the Allison (Rolls-Royce) 250-C47B","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/allison-rolls-royce-250-c47b#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"The fleet by engine type","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Every engine series","note":"","unit":"","url":"https://eflight.com/engines"}],"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":{"aircraft":15,"horsepower":650,"id":"allison-rolls-royce-250-c47b","maker":"Allison (Rolls-Royce)","name":"Allison (Rolls-Royce) 250-C47B","thrust_lb":null,"type":"Turboshaft","url":"https://eflight.com/engines/allison-rolls-royce-250-c47b"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}