{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Covers","items":[{"count":5,"name":"Lycoming O-340-A1A","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-o-340-a1a"},{"count":1,"name":"Lycoming O-340-B1A","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-o-340-b1a"},{"count":60,"name":"Lycoming O-340 series","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-o-340-series"}],"relation":"covers"},{"group":"Held by","items":[{"count":null,"name":"Lycoming Engines","note":"","unit":"","url":"https://eflight.com/holders/lycoming-engines"}],"relation":"held by"},{"group":"Orders","items":[{"count":13,"name":"FAA orders on these designs","note":"","unit":"airworthiness directives","url":"https://eflight.com/certificates/E-277"},{"count":null,"name":"2026-04-11: Engine (Reciprocating)","note":"2026-04-08","unit":"","url":"https://eflight.com/directives/2026-04-11"},{"count":null,"name":"2024-21-02: Engine (Reciprocating)","note":"2024-12-05","unit":"","url":"https://eflight.com/directives/2024-21-02"},{"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"}],"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/ACFC7B7BEFFE251E8625780E005B3BB6.0001","holder":"Lycoming Engines","id":"E-277","models":["O-340-A2A","O-340-B1A","O-340-A1A"],"name":"Type certificate E-277","product_type":"Engine","type":"certificate","url":"https://eflight.com/certificates/E-277"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}