{"as_of":"2026-11-03","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"System","items":[{"count":null,"name":"Propeller","note":"","unit":"","url":"https://eflight.com/systems/propeller"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaced by 2022-08-10","note":"","unit":"","url":"https://eflight.com/directives/2022-08-10"}],"relation":"related to"},{"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":"2020-07-20","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/5522AD0AFFB1364786258588004279FD.0001","id":"2020-12-07","kind":"AD","name":"Airworthiness directive 2020-12-07","published":"2020-06-15","subject":"Propeller Blade Section","system":"propeller","type":"directive","url":"https://eflight.com/directives/2020-12-07"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}