{"as_of":"2026-10-05","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Fitted to","items":[{"count":1,"name":"Cessna 421 Golden Eagle","note":"","unit":"with this engine series","url":"https://eflight.com/models/cessna/421"}],"relation":"powers"},{"group":"Biggest operators","items":[{"count":1,"name":"Qualitair LLC Trustee","note":"","unit":"of these aircraft","url":"https://eflight.com/fleets/qualitair-llc-trustee"}],"relation":"owned by"},{"group":"Airworthiness","items":[{"count":32,"name":"FAA orders naming the Continental TSIO-520-L","note":"","unit":"airworthiness directives","url":"https://eflight.com/engines/continental-tsio-520-l#airworthiness"},{"count":11,"name":"Failure reports on the Continental TSIO-520-L","note":"","unit":"reports since 1995","url":"https://eflight.com/engines/continental-tsio-520-l#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":310,"id":"continental-tsio-520-l","maker":"Continental","name":"Continental TSIO-520-L","thrust_lb":null,"type":"Piston (reciprocating)","url":"https://eflight.com/engines/continental-tsio-520-l"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}