{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":13,"name":"Bell 427","note":"","unit":"registered","url":"https://eflight.com/models/bell/427#airworthiness"},{"count":173,"name":"Bell 429","note":"","unit":"registered","url":"https://eflight.com/models/bell/429#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":"2016-10-17","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/3DB04239E9AE7D458625803E005254D5.0001","id":"2016-20-01","kind":"AD","name":"Airworthiness directive 2016-20-01","published":"2016-09-30","subject":"Engine and Transmission Lubrication System","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/2016-20-01"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}