{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaced by 97-19-18","note":"","unit":"","url":"https://eflight.com/directives/97-19-18"}],"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":"1988-12-21","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/A9EFB30BAAF0916686256A3700667A11.0001","id":"88-24-07","kind":"AD","name":"Airworthiness directive 88-24-07","published":"","subject":"Auxiliary Power Units","system":"engine","type":"directive","url":"https://eflight.com/directives/88-24-07"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}