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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