Type certificate A8SO
Held today by Aviat Aircraft INC., earlier by Pitts\Sky International INC.. It covers 7 models; about 57 aircraft on the U.S. register are built to it. Last revised February 18, 2026 (revision 28). 10 FAA orders name its designs, and 125 approved modifications build on it.
Models under this certificate 7
S-2, S-2B, S-2A, S-2C, S-2S, S-1T, S-1S
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 10 · newest first
2006-07-112006-12-07 · ECi cylinder assemblies · engine
1998-01-2297-26-20 · Longerons · airframe structure
1996-06-0796-10-12 · Flight Control Stick · flight controls
1996-04-0396-12-03 R2 · Aft Lower Fuselage Wing Attach Fittings · airframe structure
1985-01-2185-01-04 · Cockpit Control Tube Assembly · other and general
1976-08-2076-16-08 · Rudder Control · flight controls
1973-08-1373-16-06 · Induction Air Box Flapper Door · airframe structure
1973-04-1773-07-06 · Horizontal Stabilizer Support Tube · airframe structure
Approved modifications 125 · 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/A8SO.json.