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No. of STCs: 5

STC Holder: Diamond Upgrades, LLC 920 North King Street 2nd Floor, Wilmingon, DE 19801, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH7961SW-D	Status: Current	App Date: 04/28/1989	Rev Date: 04/17/2013
Description: Installation of two Allison 250-C20R engines.
TC Nos.: H11EU
Models: Eurocopter FranceAS355F1
ACO: AIR-750: East Certification Branch NY

STC Holder: Diamond Upgrades, LLC 920 North King Street 2nd Floor, Wilmingon, DE 19801, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SH7962SW-D	Status: Current	App Date: 01/24/1989	Rev Date: 04/17/2013
Description: Installation of two Allison 250-C20R engines and enhanced antitorque system.
TC Nos.: H11EU
Models: Eurocopter FranceAS355F2
ACO: AIR-750: East Certification Branch NY

STC Holder: Diamond Upgrades, LLC 920 North King Street 2nd Floor, Wilmingon, DE 19801, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01124LA	Status: Historical	App Date: 12/01/2000	Rev Date: 08/05/2013
Description: Installation of Pratt & Whitney PT6T-3DE, or -3DF Twin-Pac in place of PT6T-3 or PT6T-3B Twin-Pac
TC Nos.: H4SW
Models: Bell Helicopter Textron212
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200

STC Holder: Diamond Upgrades, LLC 920 North King Street 2nd Floor, Wilmingon, DE 19801, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01124LA	Status: Historical	App Date: 12/01/2000	Rev Date: 10/11/2012
Description: Installation of Pratt & Whitney PT6T-3DF Twin-Pack in place of PT6T-3B Twin-Pack.
TC Nos.: H4SW
Models: Bell Helicopter Textron212
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200

STC Holder: Diamond Upgrades, LLC 920 North King Street 2nd Floor, Wilmingon, DE 19801, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR01180LA	Status: Current	App Date: 04/22/2001	Rev Date: 10/11/2012
Description: Installation of Pratt & Whitney PT6T-3DF Twin-Pack in place of PT6T-3B, -3BE, -3BF, -3BG Twin Pack
TC Nos.: H4SW
Models: Bell Helicopter Textron412
ACO: AIR-770: West Certification Branch LA