Type certificate A15SO
Held today by Adams Aerostats LLC, earlier by Adams Balloon Loft, Walz\Mcgrath, Michael D., Adams Balloon Loft\Walz\Mcgrath\Michael D.. It covers 6 models; about 47 aircraft on the U.S. register are built to the designs it names. Last revised February 28, 2024 (revision 20). 9 approved modifications build on it.
Models under this certificate 6
A50S, LD-S, A55, A55S, A-B, A-60S
On this site
Adams Balloon A50 11 registeredAdams Balloons Llc A-B 14 registeredAdams Balloons Llc A55 12 registeredAdams Balloons Llc A60 10 registered
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 9 · 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/A15SO.json.