{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":8,"name":"Douglas DC-10","note":"","unit":"registered","url":"https://eflight.com/models/douglas/dc-10#airworthiness"},{"count":17,"name":"Mcdonnell Douglas DC-10","note":"","unit":"registered","url":"https://eflight.com/models/mcdonnell-douglas/dc-10#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":"1980-10-13","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/D2DAE3E19EFB5438862569F20068B5BB.0001","id":"80-21-01","kind":"AD","name":"Airworthiness directive 80-21-01","published":"","subject":"Engine Fuel Shut-Off Valve","system":"engine","type":"directive","url":"https://eflight.com/directives/80-21-01"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}