{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":1933,"name":"Robinson R44","note":"","unit":"registered","url":"https://eflight.com/models/robinson/r44#airworthiness"},{"count":421,"name":"Robinson R66","note":"","unit":"registered","url":"https://eflight.com/models/robinson/r66#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":"2017-02-08","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/F46C066301B2A3E58625809E005C1444.0001","id":"2016-26-04","kind":"AD","name":"Airworthiness directive 2016-26-04","published":"2017-01-04","subject":"Main Rotor Blades","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/2016-26-04"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}