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: 6

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1558SW	Status: Current	App Date: 06/06/1972	Rev Date: 01/28/1982
Description: Installation of vortex generators, wing leading edge cuffs, wing tips, fairings, de-icing boots and stall strips.
TC Nos.: A6CE
Models: Cessna Aircraft Company337, 337A, 337B, 337C, 337D, 337E, 337F, 337G, 337H, P337H, T337B, T337G, T337H-SP
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1568SW	Status: Current	App Date: 08/29/1972	Rev Date: 09/05/1979
Description: Installation of wing leading edge cuff, flow fences, optional wing tips and dorsal fin.
TC Nos.: A3SO
Models: Piper Aircraft Inc.PA-32-260, PA-32-300
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA420CE	Status: Historical	App Date: 01/28/1966	Rev Date: 09/05/1979
Description: Installation Lycoming O-360-A1A or A1D engine and McCauley 2D36C14/78KM-4 propeller or Hartzell HC-C2YK-1B/766602 propeller.
TC Nos.: 3A12
Models: The Cessna Aircraft Company172, 172A, 172B, 172C, 172D, 172E, 172F (USAF T-41A), 172G, 172H (USAF T-41A)
ACO: Wichita ACO Branch, Tel: +1 (316) 946-4100

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA421CE	Status: Current	App Date: 01/28/1966	Rev Date: 07/20/1993
Description: Installation of a Lycoming O-360-A1A or O-360-A1D 180 hp engine or O-360-B1B 168 hp engine and constant speed propeller
TC Nos.: A-799
Models: The Cessna Aircraft Company170A, 170B
ACO: AIR-760: Central Certification Branch WI

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA424CE	Status: Historical	App Date: 01/28/1966	Rev Date: 09/05/1979
Description: Installation of Lycoming O-360-A1A or O-360-A1D engine and Hartzell HC-C2YK-1A/7666-2, HC-92ZK-8D/8447-12A or McCauley 2D36C14/78KM-4 propeller
TC Nos.: 3A17
Models: The Cessna Aircraft Company175, 175A, 175B
ACO: AIR-7K0: Wichita ACO Branch

STC Holder: Williams Barbara or Bob PO Box 431, 213 N Clark, Udall, KS 67146, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA545CE	Status: Current	App Date: 12/11/1967	Rev Date: 02/22/1989
Description: Installation of Lycoming O-360(180 h.p.) engine and new Hartzell Sensenich or McCauley propellers. Delete limitation pertinent to utility category operation.
TC Nos.: A13CE
Models: Cessna Aircraft Company177
ACO: AIR-760: Central Certification Branch WI