{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":7,"name":"Dehavilland DHC-7","note":"","unit":"registered","url":"https://eflight.com/models/dehavilland/dhc-7#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Fuel system","note":"","unit":"","url":"https://eflight.com/systems/fuel"}],"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":"2010-12-22","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/854F688EBF7DE1E6862577DE00567F7D.0001","id":"2010-23-21","kind":"AD","name":"Airworthiness directive 2010-23-21","published":"2010-11-17","subject":"Fuel","system":"fuel","type":"directive","url":"https://eflight.com/directives/2010-23-21"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}