We did the STC field testing.
Air 1st carried out the STC field testing for the five-blade composite MT-Propeller on both the Mitsubishi MU-2 and the Twin Commander — and is the dealer for these propellers across the Americas. They are ordered here, and installed here.

The installation
Five blades, composite
Natural-composite blades with nickel leading edges, constant speed, with feathering and reverse.
Built in Straubing
Propellers ship directly from the MT-Propeller factory in Straubing, Germany to Aiken, South Carolina.
Installed on the same field
Fitted at Carolina Turbine Support, the FAA Part 145 station that works exclusively on MU-2s.
Complete kit
Price includes spinner assemblies, propeller de-icing systems and complete de-ice kits.
Published, not on application
Air 1st publishes the price of a propeller pair. Most of this market does not.
$134,800
plus freight from Germany
- Retaining your Hartzell propellers — core charge
- + $10,000
- Full retail with core charge
- $144,800
Two 5-blade constant-speed propellers with feathering and reverse and nickel leading edges. Includes spinner assemblies, propeller de-icing systems and complete de-ice kits. Installation cost is quoted separately by Carolina Turbine Support.
Who to speak to
- Propeller orders & information
- Mike Laver, Air 1st · 803-641-9999
- Installation cost & scheduling
- Chris Milgrim, Carolina Turbine Support · 803-641-0266
Aircraft flying on these propellers
Documented installations from the Air 1st record — owner aircraft, not demonstrators.
- October 2022N21HPP model with dash 10 engines
- July 2019N777WMSolitaire
- February 2018N7HNMarquise
- June 2017N635TAPlatinum Series Solitaire
- May 2017N33EWMarquise — Harley Orange tips, Joe Timmons
Further documented installations include N19GA, N44AF, N44VR, N489AF, N50ET, N54RK, N62CN, N644EM, N68CL, N70KC, N78PK, N888NB and N888WW.
Not only the MU-2
Air 1st also carried out STC field testing for the five-blade composite MT-Propeller on the Twin Commander, and holds the same dealership for it. If you operate a Twin Commander, the ordering and installation route is identical: direct from Straubing to Aiken, fitted at Carolina Turbine Support.
Technical documents
STC paperwork, installation documentation and weight data are available on request for both the MU-2 and Twin Commander fits.
Request documentation