{"as_of":"2026-10-29","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Model families","items":[{"count":5,"name":"Summa Corp 369","note":"","unit":"registered","url":"https://eflight.com/models/summa-corp/369"}],"relation":"makes"},{"group":"Engines","items":[{"count":4,"name":"Rolls-Royce 250-C20B","note":"420 hp","unit":"of these aircraft","url":"https://eflight.com/engines/rolls-royce-250-c20b"},{"count":1,"name":"Allison (Rolls-Royce) 250-C20 series","note":"420 hp","unit":"of these aircraft","url":"https://eflight.com/engines/allison-rolls-royce-250-c20-series"}],"relation":"powered by"},{"group":"Type certificates","items":[{"count":null,"name":"MD Helicopters INC (Mdhi)","note":"holds the FAA type certificates","unit":"","url":""}],"relation":"held by"},{"group":"Where they are","items":[{"count":3,"name":"Hawaii","note":"","unit":"of these aircraft","url":"https://eflight.com/states/HI"},{"count":1,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":1,"name":"California","note":"","unit":"of these aircraft","url":"https://eflight.com/states/CA"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":2,"name":"Aa Leasing LP","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/aa-leasing-lp"},{"count":1,"name":"Windward Aviation INC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/windward-aviation-inc"}],"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":"summa-corp","name":"Summa Corp","registered":5,"type":"maker","url":"https://eflight.com/makers/summa-corp"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}