The U.S. aircraft register, updated daily
Type certificates · engine · current

Type certificate E-257

Held today by Pratt & Whitney Division. It covers 1 model. Last revised December 14, 1949 (revision 1)..

Models under this certificate 1

Twin Wasp E1

The data sheet on the FAA's site: the approved engines and propellers, weights, speeds and limits for each model.

FAA orders on these designs 0 · newest first

None in the current files.

Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/E-257.json.