The Garrett AiResearch TPE 331 is a very strong, efficient and extremely reliable Turboprop Engine.

Garrett AiResearch TPE 331 Turboprop Engine
Two Stage Centrifugal Compressor - Annular Combustion Chamber - Three Stage Axial Turbine

Jetstream 31: TPE 331-10UGR at 940 SHP, TBO at 7000 Flight Hours.
Jetstream 32: TPE 331-12UHR at 1020 SHP, TBO at 7000 Flight Hours.
Jetstream 41: TPE 331-14HR at 1650 SHP, TBO at 9000 Flight Hours.