New STCs for Slingsby Firefly and Airtractor

MT Propeller

Atting, January 2023 – German prop manufacturer MT-Propeller Entwicklung GmbH received new authorizations to install their state-of-tge-art propellers to two further aircraft models.

In a first development, EASA issued their STC No. 10081036 for the installation of the 3-blade composite propeller MTV-9-B-C/C180-50( ) on the Slingsby T67 Firefly. Since Brexit, the United Kingdom is no longer part of EASA’s jurisdiction. Therefore, the national British aviation authority CAA has issued a separate authorization to the same effect (CAA UK STC No. UK.STC.00157).



Slingsby T67 Firefly with MT’s 3-blade composite propeller MTV-9-B-C/C180-50 installed.

MT-Propeller Vice President Martin Albrecht says, that the installation features the following advantages:

- Best vibration damping characteristics for almost vibration free propeller operations

- Unlimited blade life

- Unbeatable esthetic ramp appeal

- FOD repairable blades

- Stainless Steel Leading Edges

- Improved Takeoff Distance

- Improved Cruise Performance

In a further legal measure, MT-Propeller Entwicklung GmbH have also received the EASA STC 10081080 for their Quiet Fan Jet composite propeller MTV-27-1-E-C-F-R(P)-J/CFR300-82( ) on the Airtractor AT-600, -800 Series Model: AT-602 powered by a Pratt & Whitney PT6A-45 or PT6A-60 or PT6A-65 propeller turbine.

FAA STC for Airtractor AT 602 series with 5-blade MT-Propeller MTV-27

MT-Propeller Entwicklung GmbH has also received the FAA STC SA00125IB for the Quiet Fan Jet composite propeller MTV-27-1-E-C-F-R(P)-J/CFR300-82( ) on the Airtractor AT-600, -800 Series Model: AT-602 powered by a Pratt & Whitney PT6A-45 or PT6A-60 or PT6A-65 propeller turbine. The STC is already certified by EASA STC 10081080.

MT-Propeller Vice President Martin Albrecht says, that the installation features the following advantages:

- TBO 4500 hours or 6 years, whatever comes first, for low maintenance costs

- No intermediate inspections on an agriculture installation

- No intermediate inspections are needed between the TBO which requires the propeller removal

- Reduced cost for spare parts, like blades and lower overhaul costs, for the complete propeller assembly

- No rpm restriction for the complete operational range

The long time proven MT-Propeller natural composite blades have no life limitation and are repairable in case of an FOD.

They also provide best vibration damping characteristics for almost vibration free propeller operation and have bonded on nickel alloy leading edges for superior erosion protection of the blades.



The long time proven MT-Propeller natural composite blades have no life limitation and are repairable in case of an FOD such as here on this Airtractor aircraft.

Once again, MT-Propeller Vice President Martin Albrecht points to the following advantages:

- No propeller ADs

- TBO 4500 hours or 6 years, whatever comes first, for low maintenance costs

- No intermediate inspections on an agriculture installation

- No intermediate inspections are needed between the TBO which requires the propeller removal

- Reduced cost for spare parts, like blades and lower overhaul costs, for the complete propeller assembly

- No rpm restriction for the complete operational range

The long time proven MT-Propeller natural composite blades have no life limitation and are repairable in case of an FOD.

They also provide best vibration damping characteristics for almost vibration free propeller operation and have bonded on nickel alloy leading edges for superior erosion protection of the blades.

About MT-Propeller



MT-Propeller is the world leading natural composite propeller manufacturer with 30 certified propeller models from 2-blade to 7-blade hydraulically controlled variable pitch propeller, for engines producing up to 5000hp, and 2-blade to 4-blade electrically controlled variable pitch propeller, for engines producing up to 350hp as well as two blade fixed pitch propellers.

The high performance, light weight and durable MT-Propellers can be used on aircraft with piston engines and propeller turbines, as well as on airships, wind tunnels and hovercraft. MT-Propellers can be developed for nearly every aircraft type from motor gliders to regional airliners.

Fulfilling the highest certification requirements they are also supplemental type certified on Part 25 aircraft.

MT-Propeller is holder of over 220 STCs worldwide and OEM supplier for more than 90% of the European Aircraft Industry as well as 30% of the US Aircraft Industry. More than 28 000 propeller systems with more than 90 000 blades are in service.

180 Million fleet hours where already performed on MT-Propellers.

With the longest industry TBO of 4500 hours or 6 years for the 5-bladed turbo prop MT-Propeller has proven the reliability over years.

A factory certified network of 62 service centers, provides best service and maintenance all over the world.

MT-PROPELLER Entwicklung GmbH
Airport Straubing-Wallmuehle
D-94348 Atting - Germany
phone: +49-(0)9429-9409-0
fax: +49-(0)9429-8432
sales@mt-propeller.com
www.mt-propeller.com
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