{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":107,"name":"Agusta Spa A109","note":"","unit":"registered","url":"https://eflight.com/models/agusta-spa/a109#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Rotorcraft systems","note":"","unit":"","url":"https://eflight.com/systems/rotorcraft"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaced by 99-27-12","note":"","unit":"","url":"https://eflight.com/directives/99-27-12"}],"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":"2000-01-04","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/5FD0367FB8D3F24186256A4900452F67.0001","id":"99-26-13","kind":"AD","name":"Airworthiness directive 99-26-13","published":"1999-12-20","subject":"Blade Crack Inspection","system":"rotorcraft","type":"directive","url":"https://eflight.com/directives/99-26-13"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}