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: Al Backstrom Route 1, Box 199-B, Frisco, Texas 75034		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH4997SW	Status: Historical	App Date: 06/12/1982	Rev Date: 04/27/1983
Description: Installation of Lycoming TIVO-540-A2A engine
TC Nos.: 4H11
Models: Siam Hiller Holdings Inc.UH-12E
ACO: AIR-770: West Certification Branch LA

STC Holder: Al Backstrom Route 1, Box 199-B, Frisco, Texas 75034		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH4997SW	Status: Historical	App Date: 06/12/1982	Rev Date: 06/28/1983
Description: Installation of Lycoming TIVO-540-A2A engine
TC Nos.: 4H11
Models: Siam Hiller Holdings Inc.UH-12E
ACO: AIR-770: West Certification Branch LA