{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"System","items":[{"count":null,"name":"Propeller","note":"","unit":"","url":"https://eflight.com/systems/propeller"}],"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":"1987-12-02","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/E61615BCD71B3FF1862569740064C32B.0001","id":"87-15-05 R1","kind":"AD","name":"Airworthiness directive 87-15-05 R1","published":"","subject":"Propeller Blades","system":"propeller","type":"directive","url":"https://eflight.com/directives/87-15-05 R1"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}