Type certificate A-533
Held today by The Waco Aircraft Company. It covers 4 models; about 25 aircraft on the U.S. register are built to the designs it names. Last revised January 3, 1949 (revision 0). 20 approved modifications build on it.
Models under this certificate 4
YKS-6, YKC, YKC-S, ZKS-6
On this site
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 20 · companies holding the most
Source: FAA type certificate data sheets (Dynamic Regulatory System); register counts from the FAA register of October 5, 2026. Connections as data: /graph/certificate/A-533.json.