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No. of STCs: 2

STC Holder: Aeronautical Testing Service P.O. Box 1490, Friday Harbor, WA 98250, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4301NM	Status: Current	App Date: 01/04/1988	Rev Date: 04/15/1988
Description: Installation of a one to nine passenger configuration.
TC Nos.: A-815
Models: Viking Air LimitedDHC-3
ACO: AIR-770: West Certification Branch SEA

STC Holder: Aeronautical Testing Service P.O. Box 1490, Friday Harbor, WA 98250, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA5198NM	Status: Current	App Date: 04/08/1991	Rev Date: 06/21/1993
Description: Installation of vortex gnerators on the wing and vertical tail and a5% increase in takeoff weight.
TC Nos.: 3A25
Models: Cessna Aircraft Company335, 340, 340A
ACO: AIR-770: West Certification Branch SEA