{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":84,"name":"Pratt & Whitney Canada PT6A-41","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-canada-pt6a-41#airworthiness"},{"count":182,"name":"Pratt & Whitney Canada PT6A series","note":"","unit":"aircraft","url":"https://eflight.com/engines/pratt-whitney-canada-pt6a-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":"1978-06-19","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/0932E0909FFC58168625682C00588F75.0001","id":"78-12-04","kind":"AD","name":"Airworthiness directive 78-12-04","published":"","subject":"No. 2 Bearing Pressure Oil Transfer Tube Assembly","system":"engine","type":"directive","url":"https://eflight.com/directives/78-12-04"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}