{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":7,"name":"Douglas C-54","note":"","unit":"registered","url":"https://eflight.com/models/douglas/c-54#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Emergency equipment","note":"","unit":"","url":"https://eflight.com/systems/emergency"}],"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":"","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/7E6962829FA0E8798625683200728DD0.0001","id":"46-11-02","kind":"AD","name":"Airworthiness directive 46-11-02","published":"","subject":"Copilot Oxygen Regulator","system":"emergency","type":"directive","url":"https://eflight.com/directives/46-11-02"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}