{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":1,"name":"Gulfstream G-1159 Gulfstream II and III","note":"","unit":"with this engine series","url":"https://eflight.com/models/gulfstream/g-1159"}],"relation":"powers"},{"group":"Airworthiness","items":[{"count":8,"name":"FAA orders naming the Rolls-Royce SPEY 506-14","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/rolls-royce-spey-506-14#airworthiness"}],"relation":"subject to"},{"group":"Analytics","items":[{"count":null,"name":"The fleet by engine type","note":"","unit":"","url":"https://eflight.com/analytics/fleet"},{"count":null,"name":"Every engine series","note":"","unit":"","url":"https://eflight.com/engines"}],"relation":"compared in"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"aircraft":1,"horsepower":null,"id":"rolls-royce-spey-506-14","maker":"Rolls-Royce","name":"Rolls-Royce SPEY 506-14","thrust_lb":10410,"type":"Turbojet","url":"https://eflight.com/engines/rolls-royce-spey-506-14"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}