{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"System","items":[{"count":null,"name":"Other and general","note":"","unit":"","url":"https://eflight.com/systems/other"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaced by 99-11-11","note":"","unit":"","url":"https://eflight.com/directives/99-11-11"}],"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":"","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/17510FBCFBAD945386256CCC006B75E7.0001","id":"97-15-15","kind":"Emergency AD","name":"Airworthiness directive 97-15-15","published":"","subject":"Main Gearbox (MGB) Planetary Gear Shaft","system":"other","type":"directive","url":"https://eflight.com/directives/97-15-15"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}