{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":13,"name":"Lockheed 18","note":"","unit":"registered","url":"https://eflight.com/models/lockheed/18#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Heating, ice protection and utility systems","note":"","unit":"","url":"https://eflight.com/systems/utility"}],"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":"1999-12-27","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/1263164DD8B0CF1F86256A2C004A448D.0001","id":"99-19-08","kind":"AD","name":"Airworthiness directive 99-19-08","published":"1999-11-22","subject":"AFM - Deicing","system":"utility","type":"directive","url":"https://eflight.com/directives/99-19-08"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}