MT-Propeller - The Winner's Propeller

March, 2017
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STC M7 Aerospace LP SA227


  • M7 Aerospace LP SA227-AC (Metro III) with 5-blade MTV-27
  • Metro III with 5-blade MTV-27

STC - Data


  • Type of Aircraft: SA226/SA227

  • EASA: 10015216 (issued Dec 2011)
  • FAA: SA03893AT (issued July 24, 2013)
  • TCCA Canada: Letter of acceptance
    to the EASA STC 10015216 (former EASA.A.S.03631)
  • SCT Mexico: Validation No. IA-237/2013 (issued Nov 4, 2013)
  • INAC Venezuela: Letter of Acceptance of the FAA STC (issued Dec 22, 2016)

  • Applicable Aircraft: M7 Aerospace LP SA226-T(B), SA 227-TT, -AC,
    -AT, -CC, -BC, -DC
  • Engines:TPE331-10U-( ), TPE331-11U-(), TPE331-12UA-()
    TPE331-12UAR-(), TPE331-12UHR-()
  • Propeller: MTV-27-1-E-C-F-R(G)/CFRL250-103

  • Advantages:
  • Best vibration damping characteristics
    for almost vibration free propeller operations
  • Bonded on nickel alloy leading edge for best erosion
    protection of the blades
  • No engine modifications (no cam or beta tube change)
  • Ground roll distance reduced by approx. 50 m (165 ft)
  • Take-off distance over 50 ft obstacle reduced by
    approx. 80 m (260 ft)
  • Two engine and single engine climb performance
    slightly improved by up to 80 ft/min
  • Cruise performance slightly improved by up to 2 kts
  • Approx. 65 lbs less weight than the orig. metal propellers
  • More ground clearance for less FODs
  • Significant inside and outside noise reductions
  • Aircraft noise level is about 5 dB(A) less than with the
    original metal propellers
  • Cabin noise is reduced by 3 to 4 dB(A)
    depending on location
  • Cooler ITTs during engine start up due to a shorter starting time of 1/3
  • Unlimited blade life
  • FOD repairable blades

more information about the STC (.pdf 75k)