{"as_of":"2026-11-03","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Where they are","items":[{"count":1,"name":"Wisconsin","note":"","unit":"of these aircraft","url":"https://eflight.com/states/WI"},{"count":1,"name":"Nevada","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NV"},{"count":1,"name":"Michigan","note":"","unit":"of these aircraft","url":"https://eflight.com/states/MI"},{"count":1,"name":"Alabama","note":"","unit":"of these aircraft","url":"https://eflight.com/states/AL"},{"count":1,"name":"Alaska","note":"","unit":"of these aircraft","url":"https://eflight.com/states/AK"}],"relation":"registered in"},{"group":"Biggest operators","items":[{"count":1,"name":"Red Star Aero Services LLC","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/red-star-aero-services-llc"}],"relation":"owned by"},{"group":"Airworthiness","items":[{"count":2,"name":"Failure reports on the Avia M337AK","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/avia-m337ak#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":5,"horsepower":210,"id":"avia-m337ak","maker":"Avia","name":"Avia M337AK","thrust_lb":null,"type":"Piston (reciprocating)","url":"https://eflight.com/engines/avia-m337ak"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}