{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":244,"name":"Ayres Corporation S-2","note":"","unit":"registered","url":"https://eflight.com/models/ayres-corporation/s-2#airworthiness"},{"count":102,"name":"Thrush Aircraft Inc S-2","note":"","unit":"registered","url":"https://eflight.com/models/thrush-aircraft-inc/s-2#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Airframe structure","note":"","unit":"","url":"https://eflight.com/systems/structure"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaces 2003-07-01","note":"","unit":"","url":"https://eflight.com/directives/2003-07-01"},{"count":null,"name":"Replaced by 2009-26-11","note":"","unit":"","url":"https://eflight.com/directives/2009-26-11"}],"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":"2006-04-18","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/18444BF20ABAE0AF86257146004E5EB1.0001","id":"2006-07-15","kind":"AD","name":"Airworthiness directive 2006-07-15","published":"2006-04-17","subject":"Lower wing spar caps","system":"structure","type":"directive","url":"https://eflight.com/directives/2006-07-15"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}