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No. of STCs: 3

STC Holder: McMakin Kent 214 W. Franklin Street, Rockton, IL 61072, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA2921WE	Status: Historical	App Date:	Rev Date: 08/07/1990
Description: Reduce size of cockpit openings, install rounded windshields, flush rivet and increase fuselage skin gages, install internal top longerons, remove external top longerons and install internal aileron balance weight.
TC Nos.: A-749
Models: Ryan Aeronautical CompanyST-3KR (Army PT-22), ST-3KR (Army PT-22A)
ACO: Chicago ACO Branch, Tel: +1 (847) 294-7358

STC Holder: McMakin Kent 214 W. Franklin Street, Rockton, IL 61072, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4317WE	Status: Historical	App Date:	Rev Date: 08/07/1990
Description: Installation of Ranger 6-440-C5 engine, Sensenich 86R61 propeller, and auxiliary fuel pump, and associated changes.
TC Nos.: A-749
Models: Ryan Aeronautical CompanyST-3KR (Army PT-22), ST-3KR (Army PT-22A)
ACO: Chicago ACO Branch, Tel: +1 (847) 294-7358

STC Holder: McMakin Kent 214 W. Franklin Street, Rockton, IL 61072, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA4463NM	Status: Historical	App Date:	Rev Date: 08/07/1990
Description: Installation of Ryan Model ST-A type main landing gear.
TC Nos.: A-749
Models: Ryan Aeronautical CompanyST-3KR (Army PT-22), ST-3KR (Army PT-22A)
ACO: Chicago ACO Branch, Tel: +1 (847) 294-7358