{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Covers","items":[{"count":6,"name":"Billings Flying Service Inc CH-47","note":"","unit":"registered","url":"https://eflight.com/models/billings-flying-service-inc/ch-47"}],"relation":"covers"},{"group":"Held by","items":[{"count":null,"name":"Billings Flying Service INC.","note":"","unit":"","url":"https://eflight.com/holders/billings-flying-service-inc"}],"relation":"held by"},{"group":"Orders","items":[{"count":3,"name":"FAA orders on these designs","note":"","unit":"airworthiness directives","url":"https://eflight.com/certificates/R0015DE"},{"count":null,"name":"2024-20-05: Flight control systems","note":"2024-10-28","unit":"","url":"https://eflight.com/directives/2024-20-05"},{"count":null,"name":"2021-23-06: Rotor flight controls","note":"2022-01-04","unit":"","url":"https://eflight.com/directives/2021-23-06"},{"count":null,"name":"2018-16-11: Main Rotor Head","note":"2018-09-17","unit":"","url":"https://eflight.com/directives/2018-16-11"}],"relation":"subject to"},{"group":"More","items":[{"count":null,"name":"Every type certificate","note":"","unit":"","url":"https://eflight.com/certificates"},{"count":null,"name":"Who holds what","note":"","unit":"","url":"https://eflight.com/holders"}],"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":{"faa_document":"https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID137844184520231117175847.0001","holder":"Billings Flying Service Inc.","id":"R0015DE","models":["CH-47D","T55-GA-714A"],"name":"Type certificate R0015DE","product_type":"Aircraft","type":"certificate","url":"https://eflight.com/certificates/R0015DE"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}