The STC search system is a complimentary service provided to the aviation community. We hope you find it useful. We do not provide access to STC engineering. For that you need to contact the STC holder directly. Our primary product is a comprehensive library of aviation regulations and standards, including tools for generating Airworthiness Directive compliance reports.

No. of STCs: 2

STC Holder: Robert or Barbara Williams Box 608, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA296GL	Status: Current	App Date: 01/27/1978	Rev Date: 04/13/1982
Description: Convert to conventional landing gear.
TC Nos.: 3A12
Models: Cessna Aircraft Company172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N
ACO: AIR-760: Central Certification Branch WI

STC Holder: Robert or Barbara Williams 213 N. Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA807CE	Status: Current	App Date: 11/01/1971	Rev Date: 05/03/1990
Description: Installation of Lycoming 180 hp engine and constant speed propeller. (172P LANDPLANES)
TC Nos.: 3A12
Models: Cessna Aircraft Company172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A), 172I, 172K, 172L, 172M, 172N, 172P
ACO: AIR-760: Central Certification Branch WI