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: 4

STC Holder: Whisper Jet Inc. 12515 Willows Road NE Suite 200, Kirkland, WA 98034, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH127WE	Status: Current	App Date: 08/08/1968	Rev Date: 10/13/2000
Description: Installation of AiResearch TSE-331-3U-303N engine and related changes.
TC Nos.: 1H4
Models: Sikorsky Aircraft CorporationS-55, S-55B, S-55C
ACO: AIR-770: West Certification Branch SEA

STC Holder: Whisper Jet Inc. 12515 Willows Road NE Suite 200, Kirkland, WA 98034, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01034AT	Status: Current	App Date: 09/27/1995	Rev Date: 07/01/2002
Description: Installation of forward and aft facing seats and cabin interior.
TC Nos.: 1H4
Models: Sikorsky Aircraft CorporationS-55
ACO: AIR-770: West Certification Branch SEA

STC Holder: Whisper Jet Inc. 12515 Willows Road NE Suite 200, Kirkland, WA 98034, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01274AT	Status: Current	App Date: 03/18/1996	Rev Date: 07/01/2002
Description: Installation of cabin doors and windows.
TC Nos.: 1H4
Models: Sikorsky Aircraft CorporationS-55
ACO: AIR-770: West Certification Branch SEA

STC Holder: Whisper Jet Inc. 12515 Willows Road NE Suite 200, Kirkland, WA 98034, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR09229RC	Status: Current	App Date: 08/01/1994	Rev Date: 06/07/2010
Description: Installation approval of a 5 blade main rotor system and the Air Research TSE331-10UA-511SW engine
TC Nos.: 1H4
Models: Sikorsky Aircraft CorporationS-55
ACO: AIR-760: Central Certification Branch FTW