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: 5

STC Holder: WSH LLC 3255 S. Bodenburg LP, Palmer, AK 99645		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH1415NM	Status: Current	App Date: 10/21/1981	Rev Date: 10/21/2022
Description: Installation of a Perkins Plastics part no 3180-20 bubble window in the right hand door
TC Nos.: H1IN
Models: Airbus HelicoptersSA.315B Alouette III
ACO: AIR-778: Alaska Aviation Section ANC

STC Holder: WSH LLC 3255 S. Bodenburg Loop, Palmer, AK 99645, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH3744NM	Status: Historical	App Date: 04/13/1987	Rev Date: 12/01/2020
Description: Dual Battery Installation
TC Nos.: H3SO
Models: Richards Heavylift Helo Inc.UH-1B
ACO: Anchorage ACO Branch, Tel: +1 (907) 271-2668

STC Holder: WSH LLC 3255 S. Bodenburg Loop, Palmer, AK 99645, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH3744NM	Status: Current	App Date: 04/13/1987	Rev Date: 03/03/2023
Description: Dual Battery Installation
TC Nos.: H13WE, H1RM, H3NM, H3SO, H5SO, H6SO, H7SO, R00012AT
Models: International Helicopters Inc.UH-1B Overseas Aircraft Support Inc.UH-1B Red Tail Flying Services LLCUH-1B Richards Heavylift Helo Inc.UH-1B Rotorcraft Development CorporationUH-1B, UH-1B Southwest Florida Aviation InternationalSW204 (UH-1B), SW204HP (UH-1B) WSH LLCUH-1B
ACO: AIR-778: Alaska Aviation Section ANC

STC Holder: WSH LLC 3255 S. Bodenburg Loop, Palmer, AK 99645, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH5690NM	Status: Current	App Date: 08/13/1991	Rev Date: 02/05/2022
Description: Installation of Advanced Technology Aircraft Co. engine barrier filter.
TC Nos.: H13WE, H1RM, H1SW, H3NM, H3SO, H4NM, H5NM, H5SO, H7SO, H8NM, H9NM
Models: Bell Helicopter Textron Inc.204B, UH-1E International Helicopters Inc.UH-1B Overseas Aircraft Support IncUH-1E Richards Heavylift Helo Inc.UH-1B Rotorcraft Development CorporationUH-1B, UH-1B, UH-1E San Joaquin HelicoptersUH-1B Smith HelicoptersUH-1E West Coast FabricationsUH-1E
ACO: AIR-778: Alaska Aviation Section ANC

STC Holder: WSH LLC 3255 S. Bodenburg Loop, Palmer, Alaska 99645		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR02491AK	Status: Current	App Date: 06/22/2017	Rev Date: 08/17/2023
Description: Reduction / Limitation of passenger seats to nine (9) or less
TC Nos.: H6SW
Models: Bell Helicopter Textron214B, 214B-1
ACO: AIR-778: Alaska Aviation Section ANC