{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":1633,"name":"Cirrus SR20","note":"","unit":"registered","url":"https://eflight.com/models/cirrus/sr20#airworthiness"},{"count":7112,"name":"Cirrus SR22","note":"","unit":"registered","url":"https://eflight.com/models/cirrus/sr22#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":"2006-11-17","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/A31495E513DD07228625720600517541.0001","id":"2006-21-03","kind":"AD","name":"Airworthiness directive 2006-21-03","published":"2006-10-13","subject":"Brake caliper piston O-ring seals","system":"engine","type":"directive","url":"https://eflight.com/directives/2006-21-03"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}