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No. of STCs: 3

STC Holder: Overseas Aircraft Support Inc. 727 B. North Woodland Road, Lakeside, AZ 85929, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR00266SE	Status: Historical	App Date: 04/18/1995	Rev Date: 10/18/2007
Description: Replacement of the Lycoming Model T53-L-13B engine with a Lycoming Model T53-L-703 engine flat rated to the same power settings specified in Type Certificate Data Sheet (TCDS) H15NM
TC Nos.: H15NM
Models: Bell Helicopter TextronUH-1H
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200

STC Holder: Overseas Aircraft Support Inc. 3151 E. Airport Loop Road, Hangar #1, Show Low, AZ 85901, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR00266SE	Status: Historical	App Date: 04/18/1995	Rev Date: 03/03/2022
Description: Replacement of the Lycoming Model T53-L-13B engine with a Lycoming Model T53-L-703 engine flat rated to the same power settings specified in Type Certificate Data Sheet (TCDS) H15NM
TC Nos.: H15NM
Models: Hagglund Helicopters LLCUH-1H
ACO: AIR-770: West Certification Branch LA

STC Holder: Overseas Aircraft Support Inc. 3151 E. Airport Loop Road, Hangar #1, Show Low, AZ 85901		If you are an STC Holder, Contact us to have your company added here!
STC No.: SR00266SE	Status: Current	App Date: 04/18/1995	Rev Date: 06/26/2025
Description: Replacement of the Lycoming Model T53-L-13B engine with a Lycoming Model T53-L-703 engine flat rated to the same power settings specified in Type Certificate Data Sheet (TCDS) H15NM
TC Nos.: H15NM, H7SO, R00004RC
Models: Hagglund Helicopters LLCUH-1H JJASPP Engineering Services LLCUH-1H Overseas Aircraft Support Inc.UH-1H
ACO: AIR-770: West Certification Branch LA