{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":15,"name":"Md Helicopters Inc 500","note":"","unit":"registered","url":"https://eflight.com/models/md-helicopters-inc/500#airworthiness"},{"count":11,"name":"Md Helicopters Inc 600","note":"","unit":"registered","url":"https://eflight.com/models/md-helicopters-inc/600#airworthiness"},{"count":11,"name":"Md Helicopters Inc MD 900","note":"","unit":"registered","url":"https://eflight.com/models/md-helicopters-inc/md-900#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Rotorcraft systems","note":"","unit":"","url":"https://eflight.com/systems/rotorcraft"}],"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":"2013-03-15","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/9A3B59CED6FF961286257B0C004BA1E8.0001","id":"2013-03-03","kind":"AD","name":"Airworthiness directive 2013-03-03","published":"2013-02-08","subject":"Tail rotor blades","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/2013-03-03"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}