{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":8,"name":"Pratt & Whitney JT8D-1","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-1#airworthiness"},{"count":6,"name":"Pratt & Whitney JT8D-15","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-15#airworthiness"},{"count":1,"name":"Pratt & Whitney JT8D-15A","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-15a#airworthiness"},{"count":6,"name":"Pratt & Whitney JT8D-17","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-17#airworthiness"},{"count":1,"name":"Pratt & Whitney JT8D-17A","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-17a#airworthiness"},{"count":1,"name":"Pratt & Whitney JT8D-9","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-9#airworthiness"},{"count":5,"name":"Pratt & Whitney JT8D-9A","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-9a#airworthiness"},{"count":82,"name":"Pratt & Whitney JT8D series","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-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":"1998-02-25","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/2556D4CBDE74D1F286256880004D7C89.0001","id":"98-04-39","kind":"AD","name":"Airworthiness directive 98-04-39","published":"1998-02-25","subject":"Combustion Chamber Outer Case","system":"engine","type":"directive","url":"https://eflight.com/directives/98-04-39"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}