{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"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":"1983-11-03","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/4F1B181D1BAFFC86862569A400653FD9.0001","id":"71-06-09 R1","kind":"AD","name":"Airworthiness directive 71-06-09 R1","published":"","subject":"Auxiliary Power Unit Duct Valve","system":"engine","type":"directive","url":"https://eflight.com/directives/71-06-09 R1"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}