{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":9,"name":"Lycoming IGO-540-B1A","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-igo-540-b1a#airworthiness"},{"count":1,"name":"Lycoming IGSO-480-A1E6","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-igso-480-a1e6#airworthiness"},{"count":48,"name":"Lycoming IGSO-540-B1A","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-igso-540-b1a#airworthiness"},{"count":16,"name":"Lycoming IO-540-A1A5","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-io-540-a1a5#airworthiness"},{"count":5,"name":"Lycoming IO-540-K1E5","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-io-540-k1e5#airworthiness"},{"count":4218,"name":"Lycoming IO-540 series","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-io-540-series#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"about"},{"group":"More","items":[{"count":null,"name":"Every FAA order","note":"","unit":"","url":"https://eflight.com/directives"},{"count":null,"name":"Every aircraft system","note":"","unit":"","url":"https://eflight.com/systems"}],"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":{"effective":"1981-02-11","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/9D2C159E728B8283862568420052BB76.0001","id":"81-03-05","kind":"AD","name":"Airworthiness directive 81-03-05","published":"","subject":"Mixture Control Shaft Assembly","system":"engine","type":"directive","url":"https://eflight.com/directives/81-03-05"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}