{"as_of":"2026-10-07","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Held by","items":[{"count":null,"name":"Pratt & Whitney Division","note":"","unit":"","url":"https://eflight.com/holders/pratt-whitney-division"}],"relation":"held by"},{"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/28543F501B3E3CEE8525670D0060471A.0001","holder":"Pratt & Whitney Division","id":"E-231","models":["Double Wasp CA5","Double Wasp CA15","Double Wasp CA17","Double Wasp R2800-97","Double Wasp CA19","Double Wasp CA18","Double Wasp CA3"],"name":"Type certificate E-231","product_type":"Engine","type":"certificate","url":"https://eflight.com/certificates/E-231"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}