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FAA approves five-blade MT prop for Beech aircraft
MT-Propeller is the holder of 220 STCs worldwide and supplies 90 per cent of the European aircraft industry as well as 30 per cent of the US aircraft industry. Beech aircraft can now be kitted out with five blades.
MT says the Beech 1900, 1900C and 1900D upgrade is a smart move.

MT-Propeller Entwicklung has received FAA STC for the installation of its MTV-27-1 Quiet Fan Jet composite propeller on Beech 1900, 1900C and 1900D models powered by Pratt & Whitney PT6A-65B or -67D propeller turbine engines. This installation is already supplemental type certified by EASA and TCCA.

MT-Propeller president Gerd Muehlbauer states that the installation features the following advantages compared to the original four-blade propellers: “The five-blade MT-Propeller has a smaller diameter of about eight inches compared to the original four-blade propeller, which means greater ground clearance of about four inches for less FOD and also more clearance to the fuselage and therefore less cabin noise from the prop tips. Take-off of the Beech 1900 is improved by four per cent, so compared to the original AFM a higher safety for the calculated take-off run. The MTV-27 has no propeller ADs, and the five-blade MT-Propeller reduces propeller noise by up to 5 dB(A). The MTV-27 also has bonded on wide chord nickel alloy leading edges for superior erosion protection of the blades.

“TBO for the MT-Propeller is 4,500 hours or six years, whatever comes first, for low maintenance costs. No intermediate inspections are needed between the TBO which requires the propeller removal. This comes with reduced costs for spare parts, like blades and lower overhaul costs, for the complete propeller assembly, and there is no RPM restriction for the complete operational range.”

Other News
 
MT-Propeller celebrates opening of three production buildings
October 3, 2024
All metal propeller parts can now be manufactured at HQ. The hangars also provide additional space for the direct installation of propellers on customer aircraft and increase sales, spare parts and shipping capacity.
INAC Venezuela accepts five-blade STC for King Air 200
September 18, 2024
This installation provides general performance improvement, around 25lbs less weight than the original 4-blade propellers and there are no propeller speed restrictions on ground while operating in low idle.
TCCA ticks EASA STC for PC-12 with seven-blade MT prop
August 19, 2024
This installation is also already certified by FAA SA02742NY.