{"as_of":"2026-11-03","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":10,"name":"Mcdonnell Douglas Aircraft Co MD-88","note":"","unit":"registered","url":"https://eflight.com/models/mcdonnell-douglas-aircraft-co/md-88#airworthiness"},{"count":93,"name":"Mcdonnell Douglas DC-9","note":"","unit":"registered","url":"https://eflight.com/models/mcdonnell-douglas/dc-9#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 99-24-04","note":"","unit":"","url":"https://eflight.com/directives/99-24-04"}],"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":"1999-12-27","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/CADC42E13301046D86256CB7006F2674.0001","id":"99-24-04 C1","kind":"AD","name":"Airworthiness directive 99-24-04 C1","published":"1999-12-27","subject":"Hi-Lok Pin Fasteners","system":"structure","type":"directive","url":"https://eflight.com/directives/99-24-04 C1"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}