{"as_of":"2026-10-30","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":6,"name":"Boeing Of Canada/Dehav Div DHC-8","note":"","unit":"registered","url":"https://eflight.com/models/boeing-of-canada-dehav-div/dhc-8#airworthiness"},{"count":58,"name":"Bombardier DHC-8 Dash 8 and Q400","note":"","unit":"registered","url":"https://eflight.com/models/bombardier/dhc-8#airworthiness"},{"count":28,"name":"Dehavilland DHC-8","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-8#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":"1999-10-27","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/64321B25A4F319B4862569850046E674.0001","id":"99-19-34","kind":"AD","name":"Airworthiness directive 99-19-34","published":"1999-09-22","subject":"Hydraulic System Components","system":"engine","type":"directive","url":"https://eflight.com/directives/99-19-34"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}