{"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":"Related orders","items":[{"count":null,"name":"Replaces 2009-10-02","note":"","unit":"","url":"https://eflight.com/directives/2009-10-02"},{"count":null,"name":"Replaced by 2016-07-09","note":"","unit":"","url":"https://eflight.com/directives/2016-07-09"}],"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":"2011-11-23","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/6B18AAC3C48BB6DA8625792E004FFAB4.0001","id":"2011-21-06","kind":"AD","name":"Airworthiness directive 2011-21-06","published":"2011-10-19","subject":"Main landing gear, Nose landing gear, and Fuel vapor ignition sources","system":"engine","type":"directive","url":"https://eflight.com/directives/2011-21-06"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}