{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":13,"name":"Bell HH-1","note":"","unit":"registered","url":"https://eflight.com/models/bell/hh-1#airworthiness"},{"count":398,"name":"Bell UH-1 Huey (Iroquois)","note":"","unit":"registered","url":"https://eflight.com/models/bell/uh-1#airworthiness"},{"count":5,"name":"Southwest Florida Aviation SW205","note":"","unit":"registered","url":"https://eflight.com/models/southwest-florida-aviation/sw205#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 97-20-09","note":"","unit":"","url":"https://eflight.com/directives/97-20-09"}],"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":"2000-01-11","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/EA58FC0B28841C8C86256A4D004CDD0C.0001","id":"99-25-12","kind":"AD","name":"Airworthiness directive 99-25-12","published":"1999-12-07","subject":"Tailboom Vertical Fin Spar","system":"structure","type":"directive","url":"https://eflight.com/directives/99-25-12"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}