{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":1,"name":"Rolls-Royce DART 510&511","note":"","unit":"aircraft","url":"https://eflight.com/engines/rolls-royce-dart-510-511#airworthiness"},{"count":4,"name":"Rolls-Royce DART 529","note":"","unit":"aircraft","url":"https://eflight.com/engines/rolls-royce-dart-529#airworthiness"},{"count":1,"name":"Rolls-Royce DART 535-7R","note":"","unit":"aircraft","url":"https://eflight.com/engines/rolls-royce-dart-535-7r#airworthiness"},{"count":1,"name":"Rolls-Royce DART 542","note":"","unit":"aircraft","url":"https://eflight.com/engines/rolls-royce-dart-542#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"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":"2000-02-28","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/61D2FFBA70F63EC98625688200615C27.0001","id":"99-27-04","kind":"AD","name":"Airworthiness directive 99-27-04","published":"1999-12-29","subject":"Low Torque Switches","system":"engine","type":"directive","url":"https://eflight.com/directives/99-27-04"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}