MT-Propeller keeps cranking out new STCs

Prop mods for Cessna 206/414 plus Beech 33/35 OK’d by FAA and EASA

Atting, July 2022 – German propeller manufacturer MT-Propeller Entwicklung GmbH keeps cranking out new supplemental type certificates (STCs) by the European and U.S. aviation regulators EASA and FAA.

This time, AEROMARKT is delighted to report one new FAA STC for MT’s 5-blade natural composite propeller MTV-5-1-E-C-F-R(P)/CFR220-54( ) for installation in aircraft of Cessna 206’s series that are re-equipped with PT6A propeller turbines in accordance with EASA STC # 10061949 / FAA STC SA04034CH with a reduction of the maximum prop rpm to 1900 rpm acc. to Service Bulletin No. 4034-001 PT6A-11, -20, -20A, -20B, -21, -6/C20, -110, -112. This installation is already supplemental type certified by EASA with their STC 10078672.



MT Propeller’s 5-blade natural composite propeller installed in the Cessna 206.

MT-Propeller President Gerd Muehlbauer says that the installation has the following advantages:

- Bonded on nickel alloy leading edge for superior erosion protection of the blades

- Cruise Performance improved by up to 6-8 KTAS

- Improved ramp appeal

- Reduced prop diameter, more ground clearance for reduced FOD

- Complies with strict German noise regulations 2010

Two further STCs, this time by EASA, relate to Cessna’s 414 and Beechcraft’s models 33 and 35. In case of the former, MT-Propeller Entwicklung GmbH has received the EASA STC 10079705 for the 4-blade natural composite propeller MTV-14-D-C-F/CF188-30g in the Cessna 414 RAM IV, VI, VII series powered by the engines TCM TSIO-520-J,-JB,-N,-NB plus engines modified by RAM. This EASA STC replaces the LBA STC SA1318, and the FAA STC update is in progress.



MT Propeller’s 4-blade natural composite propeller installed in the Cessna 414.

MT-Propeller Vice President Martin Albrecht pointed out the following advantages of this modification:

- Bonded on Stainless Steel or Nickel Leading Edges for best erosion protection of the blades

- Shorter take-off distance by approx. -3% (SL, ISA conditions)

- Enhanced climb by approx. 5% to 8% (SL, ISA conditions)

- Cruise performance increased by approx. 3 to 5 kts (MTOW, ISA conditions)

- Approx. 20 lbs less weight than the original propellers

MT-Propeller's modification also includes Cessna 414 modified with RAM III & IV FAA STC SA4379SW, RAM VI FAA STC SA8424S-D, and RAM VII FAA STC SA09469SC-D

For the Beech aircraft models covered by these new STCs, MT-Propeller Entwicklung GmbH received the EASA STC 10079703 for the 3-blade natural composite propeller MTV-9-D/200-52( ) on the Beech Bonanza 33, 35 series powered by the engines Continental IO-470-K, IO-470-J / -K, IO-470-K, O-470-G, IO-470-C. The FAA STC is in progress.

Gerd Muehlbauer says that installing his MTV-9 prop gains the owners/pilots of the Beech 33 and 35 Bonanza some very significant advantages, namely:

- Best vibration damping characteristics for almost vibration free propeller operations

- Bonded on Nickel Leading edge for best erosion protection of the blades

- Enhanced take-off distance by approx. 5 % (MTOW, SL, ISA conditions)



MT President Gerd Muehlbauer says that installing his MTV-9 prop gains the owners/pilots of the Beech 33 and 35 Bonanza some very significant advantages.

In all of the above mentioned modifications, the long time proven MT-Propeller natural composite blades provide significant inside and outside noise reduction. They 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.

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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