Aircraft STC directory

Ryan Aeronautical ST-3KR STCs

The Jun 30, 2026 FAA DRS snapshot contains 3 selected supplemental type certificates with status Current whose public applicability data names the Ryan Aeronautical ST-3KR. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

listed Current at snapshot

holder directories

modification categories

Apr 30, 2008

latest recorded revision

Modification demand surface

Flight controls1

Engine and powerplant1

Landing gear and brakes1

Recorded holders

Helicorp Inc.3

Recently revised ST-3KR STCs

Showing the 3 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA2921WEFlight controlsRevised Apr 30, 2008

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.

FAA holder: Helicorp Inc.

View record

SA4317WEEngine and powerplantRevised Apr 30, 2008

Installation of Ranger 6-440-C5 engine, Sensenich 86R61 propeller, and auxiliary fuel pump, and associated changes.

FAA holder: Helicorp Inc.

View record

SA4463NMLanding gear and brakesRevised Apr 30, 2008

Installation of Ryan Model ST-A type main landing gear.

FAA holder: Helicorp Inc.

View record