{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":6,"name":"Pratt & Whitney JT8D-15","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-15#airworthiness"},{"count":6,"name":"Pratt & Whitney JT8D-17","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-jt8d-17#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":"1985-12-26","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/18EFD680C311E91E8625685F0070D033.0001","id":"85-19-51 R1","kind":"AD","name":"Airworthiness directive 85-19-51 R1","published":"","subject":"Second Stage Turbine Disk","system":"engine","type":"directive","url":"https://eflight.com/directives/85-19-51 R1"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}