{"as_of":"2026-10-08","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":1,"name":"Pratt & Whitney JT9D-7","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt9d-7#airworthiness"},{"count":13,"name":"Pratt & Whitney JT9D series","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt9d-series#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":"2009-05-05","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/5E46C22A29FD390E8625758A004CF5CE.0001","id":"2009-04-18","kind":"AD","name":"Airworthiness directive 2009-04-18","published":"2009-06-25","subject":"2nd stage high pressure turbine (HPT)","system":"engine","type":"directive","url":"https://eflight.com/directives/2009-04-18"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}