STC Holder: Yehnert Helicopters, Inc

The Aviation DataBase -- STC Selection System
Aviation DataSource, Inc.

No. of STCs: 4

STC Holder: Yehnert Helicopters, Inc Address: 1049 Airport Drive, Upland, CA 91786, United States		Contact us to have your company added here!
STC No.: SE78WE	Status: Current	App Date:	Rev Date: 08/11/1976
TC Nos.: E9EA,
Models: Wytwornia Sprzetu Komunikacyjnego: 6A-350-C1, 6A-350-C1A, 6A-350-C2
ACO: AIR-770: West Certification Branch LA
Install two locking pins in Franklin Part Number 21014J oil transfer collar, 180 degrees apart, to prevent rotation of oil seal in collar.

STC Holder: Yehnert Helicopters, Inc Address: 1049 Airport Drive, Upland, CA 91786, United States		Contact us to have your company added here!
STC No.: SH3556NM	Status: Current	App Date:	Rev Date: 12/17/1986
TC Nos.: H3WE,
Models: MD Helicopter Inc.: 369D, 369H, 369HE, 369HS
ACO: AIR-770: West Certification Branch LA
Installation of low profile instrument panel.

STC Holder: Yehnert Helicopters, Inc Address: 1049 Airport Drive, Upland, CA 91786, United States		Contact us to have your company added here!
STC No.: SH4544NM	Status: Current	App Date:	Rev Date: 08/31/1994
TC Nos.: H3WE,
Models: MD Helicopter Inc.: 369E
ACO: AIR-770: West Certification Branch LA
Modification of engine inlet fairing.

STC Holder: Yehnert Helicopters, Inc Address: 1049 Airport Drive, Upland, CA 91786, United States		Contact us to have your company added here!
STC No.: SR00135LA	Status: Current	App Date: 11/22/1994	Rev Date: 12/15/1995
TC Nos.: 4H10, 4H11,
Models: Hiller Aviation: UH-12D (Army UH-23D) Rogerson Hiller Corporation: UH-12E, UH-12E-L
ACO: AIR-770: West Certification Branch LA
Installation of Yehnert Tail Rotor Blades YH-278 as replacements for Hiller Tail Rotor Blades 55073.