{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Covers","items":[{"count":217,"name":"Hiller UH-12","note":"","unit":"registered","url":"https://eflight.com/models/hiller/uh-12"}],"relation":"covers"},{"group":"Held by","items":[{"count":null,"name":"Siam Hiller Holdings INC.","note":"","unit":"","url":"https://eflight.com/holders/siam-hiller-holdings-inc"}],"relation":"held by"},{"group":"Orders","items":[{"count":60,"name":"FAA orders on these designs","note":"","unit":"airworthiness directives","url":"https://eflight.com/certificates/6H2"},{"count":null,"name":"2025-15-02: Main Rotor Mast/Swashplate","note":"2025-09-24","unit":"","url":"https://eflight.com/directives/2025-15-02"},{"count":null,"name":"2023-11-07: Ground Proximity System","note":"2023-06-22","unit":"","url":"https://eflight.com/directives/2023-11-07"},{"count":null,"name":"2021-23-13: Ground Proximity System","note":"2021-12-09","unit":"","url":"https://eflight.com/directives/2021-23-13"},{"count":null,"name":"2000-24-21: Control System Linkage","note":"2001-01-10","unit":"","url":"https://eflight.com/directives/2000-24-21"}],"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/1D44A1EA3F1601EE86257ED000643085.0001","holder":"Siam Hiller Holdings Inc.","id":"6H2","models":["UH-12C","UH-12B"],"name":"Type certificate 6H2","product_type":"Aircraft","type":"certificate","url":"https://eflight.com/certificates/6H2"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}