{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":935,"name":"Piper PA-31 Navajo and Chieftain","note":"","unit":"registered","url":"https://eflight.com/models/piper/pa-31#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Engine","note":"","unit":"","url":"https://eflight.com/systems/engine"}],"relation":"about"},{"group":"Related orders","items":[{"count":null,"name":"Replaces 82-16-05 R1","note":"","unit":"","url":"https://eflight.com/directives/82-16-05 R1"}],"relation":"related to"},{"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":"2013-07-17","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/6DBFC2B419A3F03386257B8800465F0A.0001","id":"2013-10-04","kind":"AD","name":"Airworthiness directive 2013-10-04","published":"2013-09-05","subject":"Engine Exhaust","system":"engine","type":"directive","url":"https://eflight.com/directives/2013-10-04"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}