Aircraft STC directory
International Helicopters UH-1B STCs
The Jun 30, 2026 FAA DRS snapshot contains 14 selected supplemental type certificates with status Current whose public applicability data names the International Helicopters UH-1B. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
Modification demand surface
Recently revised UH-1B STCs
Showing the 14 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
Installation of tailboom 24 inch plug extension, commercial style main rotor blades, and rotorhead.
FAA holder: Midwest Aerospace TC LLC
Replacement of Lycoming T53-L-13 series powerplant.
FAA holder: Midwest Aerospace TC LLC
Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003, and Control Cables.
FAA holder: Midwest Aerospace TC LLC
Modification of the vertical fin spar.
FAA holder: Midwest Aerospace TC LLC
Installation of UH-1H composite main rotor blades on the UH-1B helicopters.
FAA holder: Northern X-Treme Helicopters
Installation of Advanced Technology Aircraft Co. engine barrier filter.
FAA holder: WSH LLC
Installation of a Helicopter Technology Company main rotor blade assembly.
FAA holder: Helicopter Technology Co
Install Airwolf Aerospace, LLC Tension-Torsion Strap Assemblies, P/N AA-204-310-101-101 or AA-204-310-101-103.
FAA holder: Airwolf Aerospace LLC
Installation of an AKV, Inc Exceedence and Trend Monitoring System kit P/N ETM1000.
FAA holder: AKV Inc.
Install the VTOL ASSALT V3 Windscreen Laminate Kit.
FAA holder: VTOL LLC
Installation of a VAn Horn Aviation Tail Rotor Blade.
FAA holder: Van Horn Aviation LLC