Type certificate ATC 90
Held today by Pratt & Whitney Division. It covers 3 models. 2 approved modifications build on it.
Models under this certificate 3
Wasp S1D1-G, Wasp TD1, Wasp S1D1
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.
Approved modifications 2 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 7, 2026. Connections as data: /graph/certificate/ATC 90.json.