{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Covers","items":[{"count":218,"name":"Lycoming R680","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-r680"}],"relation":"covers"},{"group":"Held by","items":[{"count":null,"name":"Textron Lycoming Avco Corporation","note":"","unit":"","url":"https://eflight.com/holders/textron-lycoming-avco-corporation"}],"relation":"held by"},{"group":"Orders","items":[{"count":5,"name":"FAA orders on these designs","note":"","unit":"airworthiness directives","url":"https://eflight.com/certificates/ATC 42 Textron Lycoming"},{"count":null,"name":"2012-03-07: Carburetor","note":"2012-03-27","unit":"","url":"https://eflight.com/directives/2012-03-07"},{"count":null,"name":"2004-10-14: Crankshaft gear","note":"2004-06-25","unit":"","url":"https://eflight.com/directives/2004-10-14"},{"count":null,"name":"95-26-02: Aviation Gasoline","note":"1996-01-24","unit":"","url":"https://eflight.com/directives/95-26-02"},{"count":null,"name":"90-04-06 R1: Propeller Governor External Oil Line","note":"1991-05-28","unit":"","url":"https://eflight.com/directives/90-04-06 R1"}],"relation":"subject to"},{"group":"More","items":[{"count":null,"name":"Every type certificate","note":"","unit":"","url":"https://eflight.com/certificates"},{"count":null,"name":"Who holds what","note":"","unit":"","url":"https://eflight.com/holders"}],"relation":"see also"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"faa_document":"https://drs.faa.gov/browse/excelExternalWindow/0001847EDB0CEBC6862572C0006DF231.0001","holder":"Textron Lycoming AVCO Corporation","id":"ATC 42 Textron Lycoming","models":["R-680"],"name":"Type certificate ATC 42 Textron Lycoming","product_type":"Engine","type":"certificate","url":"https://eflight.com/certificates/ATC 42 Textron Lycoming"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}