Pratt & Whitney Canada PT6A

The Pratt & Whitney Canada PT6A is a turboprop engine from Pratt & Whitney Canada, in service since 1960. The Pratt & Whitney Canada PT6A is the world's most widely used turboprop engine family with over 51,000 engines delivered, powering more than 130 aircraft types across commercial, military, and general aviation sectors. The reverse-flow, free-power-turbine design allows the engine to be started with much lower starter power and contributes to its compact dimensions. Power ratings range from 580 to 2,000 shp across the extensive variant lineup.

It powers aircraft such as the Beechcraft King Air 200, Beechcraft King Air 350, Cessna Caravan, Pilatus PC-12 and others. When buying or overhauling a turboprop like this, the figures that matter most to operators are time since overhaul, program enrolment (engine maintenance program vs time-and-material), and the cost of the next shop visit — all of which a seller quote should make clear.