{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":5,"name":"Erickson S-64","note":"","unit":"registered","url":"https://eflight.com/models/erickson/s-64#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Rotorcraft systems","note":"","unit":"","url":"https://eflight.com/systems/rotorcraft"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaces 90-26-12","note":"","unit":"","url":"https://eflight.com/directives/90-26-12"}],"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":"2013-12-27","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/D1DB0BDB943F0E1F86257C2B004F572B.0001","id":"2013-23-07","kind":"AD","name":"Airworthiness directive 2013-23-07","published":"2013-11-22","subject":"Main Rotor Blades","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/2013-23-07"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}