{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":83,"name":"Lycoming O-320-H2AD","note":"","unit":"aircraft","url":"https://eflight.com/engines/lycoming-o-320-h2ad#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":"1979-02-20","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/BF436A5A0FCBD0DB86256E120055B30B.0001","id":"77-07-07","kind":"AD","name":"Airworthiness directive 77-07-07","published":"","subject":"Oil Level Gage","system":"engine","type":"directive","url":"https://eflight.com/directives/77-07-07"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}