{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":5,"name":"Croman Corp SH-3","note":"","unit":"registered","url":"https://eflight.com/models/croman-corp/sh-3#airworthiness"},{"count":54,"name":"Sikorsky S-61","note":"","unit":"registered","url":"https://eflight.com/models/sikorsky/s-61#airworthiness"},{"count":14,"name":"Sikorsky SH-3","note":"","unit":"registered","url":"https://eflight.com/models/sikorsky/sh-3#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":"2021-07-01","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/F06CC2C23CF2B9F0862586E20051BC65.0001","id":"2021-10-16","kind":"AD","name":"Airworthiness directive 2021-10-16","published":"2021-05-27","subject":"Engine/Transmission Coupling","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/2021-10-16"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}