Pratt & Whitney Canada PT6A-135A is a PT6A-100-series turboprop model. EASA IM.E.094 describes the series with a two-stage reduction gearbox, single-stage power turbine, single-stage gas-generator turbine, four-stage gas-generator compressor (three axial and one centrifugal), and a single annular combustion chamber; for PT6A-135A it records 559 kW maximum continuous and take-off shaft power.