A Cargojet Airways Boeing 757-200 freighter, registration C-FGKJ performing flight W8-992 from Cincinnati,KY (USA) to Calgary,AB (Canada) with 2 crew, had just reached cruise level 340 when the left hand engine (RB211) rolled back prompting the crew to shut the engine down and return to Cincinnati for a safe landing about one hour after departure.
The Canadian TSB reported the engine roll back and shut down happened in initial climb. Maintenance is assessing potential engine damage.