{"as_of":"2026-11-02","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":75,"name":"British Aerospace BAE 125","note":"","unit":"registered","url":"https://eflight.com/models/british-aerospace/bae-125#airworthiness"},{"count":7,"name":"Hawker Siddeley HS.125 SERIES 700A","note":"","unit":"registered","url":"https://eflight.com/models/hawker-siddeley/hs-125-series-700a#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"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":"1989-09-28","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/209DA7E0CF9D9BF6862569F300525764.0001","id":"89-18-13","kind":"AD","name":"Airworthiness directive 89-18-13","published":"","subject":"AFM Changes - APU","system":"engine","type":"directive","url":"https://eflight.com/directives/89-18-13"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}