Type certificate TC 598
Held today by The Waco Aircraft Company. It covers 3 models; about 12 aircraft on the U.S. register are built to the designs it names. 12 approved modifications build on it.
Models under this certificate 3
YQC-6, AQC-6, ZQC-6 (Army UC-72H)
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 12 · 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/TC 598.json.