{"as_of":"2026-11-09","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":5,"name":"Tandem Rotor Llc CH47","note":"","unit":"registered","url":"https://eflight.com/models/tandem-rotor-llc/ch47"}],"relation":"makes"},{"group":"Engines","items":[{"count":5,"name":"Honeywell T55-GA-714A","note":"","unit":"of these aircraft","url":"https://eflight.com/engines/honeywell-t55-ga-714a"}],"relation":"powered by"},{"group":"Type certificates","items":[{"count":null,"name":"Tandem Rotor LLC","note":"holds the FAA type certificates","unit":"","url":""}],"relation":"held by"},{"group":"Where they are","items":[{"count":3,"name":"Montana","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MT"},{"count":2,"name":"Michigan","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MI"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":3,"name":"Heligroup Fire LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/heligroup-fire-llc"},{"count":2,"name":"Construction Helicopters LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/construction-helicopters-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":"tandem-rotor-llc","name":"Tandem Rotor Llc","registered":5,"type":"maker","url":"https://eflight.com/makers/tandem-rotor-llc"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}