{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":1,"name":"Fairchild (Ranger) 6-440-C4","note":"","unit":"aircraft","url":"https://eflight.com/engines/fairchild-ranger-6-440-c4#airworthiness"},{"count":292,"name":"Fairchild (Ranger) 6-440 series","note":"","unit":"aircraft","url":"https://eflight.com/engines/fairchild-ranger-6-440-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":"","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/2F62B581D43C18478625682B005FD932.0001","id":"52-03-01","kind":"AD","name":"Airworthiness directive 52-03-01","published":"","subject":"Pistons","system":"engine","type":"directive","url":"https://eflight.com/directives/52-03-01"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}