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  • last update December 14, 2023
STC Air Tractor AT-30(),-40(),-50()

STC - Data


  • FAA STC: SA00888SE (issued March 12, 2001)

  • STC Holder:
  • Cascade Aircraft Conversions, LLC
  • 903 Grinnell Road
  • Garfield, WA 99130

  • Applicable Aircraft: Air Tractor AT-300, AT-301, AT-302, AT-400, AT-400A, AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-502, AT-502B, AT-503A
  • Engines: Walter M601-E11, Walter M601-D11
  • Propeller: V508E-AG/106/A


  • Advantages:
  • Our propellers bring you the unique solution of removable blades. Shipping and storage of such a propeller is much easier and cheaper compared to the fixed blade option.
  • Our blades are made of durable high quality aluminum alloy designed for propeller blades.
  • No propeller ADs
  • TBO 2500 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