{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":71,"name":"Airbus Helicopters EC120","note":"","unit":"registered","url":"https://eflight.com/models/airbus-helicopters/ec120#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaced by 2000-05-17","note":"","unit":"","url":"https://eflight.com/directives/2000-05-17"}],"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":"1999-10-19","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/CFC76FB6B6CECFD086256A4C00531008.0001","id":"99-19-23","kind":"AD","name":"Airworthiness directive 99-19-23","published":"1999-10-04","subject":"Engine Coupling Tube Inspection","system":"engine","type":"directive","url":"https://eflight.com/directives/99-19-23"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}