{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":1,"name":"Piper PA-31 Navajo and Chieftain","note":"","unit":"with this engine series","url":"https://eflight.com/models/piper/pa-31"}],"relation":"powers"},{"group":"Where they are","items":[{"count":1,"name":"Nevada","note":"","unit":"of these aircraft","url":"https://eflight.com/states/NV"}],"relation":"registered in"},{"group":"Airworthiness","items":[{"count":33,"name":"FAA orders naming the Lycoming LTIO-540-F2BD","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/lycoming-ltio-540-f2bd#airworthiness"},{"count":14,"name":"Failure reports on the Lycoming LTIO-540-F2BD","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/lycoming-ltio-540-f2bd#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":325,"id":"lycoming-ltio-540-f2bd","maker":"Lycoming","name":"Lycoming LTIO-540-F2BD","thrust_lb":null,"type":"Piston (reciprocating)","url":"https://eflight.com/engines/lycoming-ltio-540-f2bd"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}