{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":18633,"name":"Piper PA-28 Cherokee, Warrior, Archer and Arrow","note":"","unit":"registered","url":"https://eflight.com/models/piper/pa-28#airworthiness"},{"count":3917,"name":"Piper PA-32 Cherokee Six, Lance and Saratoga","note":"","unit":"registered","url":"https://eflight.com/models/piper/pa-32#airworthiness"},{"count":998,"name":"Piper PA-34 Seneca","note":"","unit":"registered","url":"https://eflight.com/models/piper/pa-34#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Airframe structure","note":"","unit":"","url":"https://eflight.com/systems/structure"}],"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":"1974-09-07","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/7B3FB83BF9EA7C878625699900513DC5.0001","id":"74-19-01","kind":"AD","name":"Airworthiness directive 74-19-01","published":"1974-09-06","subject":"Outer Wing Spars","system":"structure","type":"directive","url":"https://eflight.com/directives/74-19-01"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}