{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":25,"name":"Pratt & Whitney PW4056","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-pw4056#airworthiness"},{"count":10,"name":"Pratt & Whitney PW4460","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-pw4460#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":"1999-09-14","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/F73F1CF4358771EF862568800055969C.0001","id":"99-15-01","kind":"AD","name":"Airworthiness directive 99-15-01","published":"1999-07-16","subject":"Low Pressure Turbine Disks","system":"engine","type":"directive","url":"https://eflight.com/directives/99-15-01"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}