{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":4,"name":"Piper AEROSTAR 601","note":"","unit":"with this engine series","url":"https://eflight.com/models/piper/aerostar-601"},{"count":2,"name":"Smith AEROSTAR 601","note":"","unit":"with this engine series","url":"https://eflight.com/models/smith/aerostar-601"}],"relation":"powers"},{"group":"Where they are","items":[{"count":3,"name":"Florida","note":"","unit":"of these aircraft","url":"https://eflight.com/states/FL"},{"count":2,"name":"Delaware","note":"","unit":"of these aircraft","url":"https://eflight.com/states/DE"},{"count":1,"name":"Texas","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TX"},{"count":1,"name":"Tennessee","note":"","unit":"of these aircraft","url":"https://eflight.com/states/TN"},{"count":1,"name":"Oklahoma","note":"","unit":"of these aircraft","url":"https://eflight.com/states/OK"}],"relation":"registered in"},{"group":"Airworthiness","items":[{"count":33,"name":"FAA orders naming the Lycoming IO-540-S1A5","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/lycoming-io-540-s1a5#airworthiness"},{"count":31,"name":"Failure reports on the Lycoming IO-540-S1A5","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/lycoming-io-540-s1a5#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":10,"horsepower":300,"id":"lycoming-io-540-s1a5","maker":"Lycoming","name":"Lycoming IO-540-S1A5","thrust_lb":null,"type":"Piston (reciprocating)","url":"https://eflight.com/engines/lycoming-io-540-s1a5"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}
