What was found
(CAN) A/C HAD JUST DROPPED A 15,000 LB LOAD OF LOGS AT LOG LANDING IN AN UP HILL YARD. PILOT MADE A LT PEDAL TURN TO DEPART LOG LANDING. COLLECTIVE LOWERED TO DESCEND BACK DOWN TO CUT BLOCK, NR 2 ENG N1 UNDER-SPEED WARNING SOUNDED & WITH WARNING LIGHTS, INDICATING SOFT STALL. CREW EXECUTED AN IN-FLIGHT SHUTDOWN & MOTORING OF ENG TO PREVENT OVER-TEMP. NR 2 ENG SHUTDOWN COMPLET, A/C RETURNED TO SERVICE AREA & MADE A SINGLE ENG LANDING. COMPLETE INSP OF ENG & CONTROL LINKS REVEALED NOTHING ABNORMAL. ENG FUEL FILTER INSP FOR CONTAM, NONE FOUND. ENG FUEL PRESSURIZING & DUMP VALVE CHANGED. FCU ALSO CHANGED AS A PRECAUTION. ENG RESTARTED & GROUND-RUN, ALL PARAMETERS FOUND TO BE ACCEPTABLE & A/C RELEASED FOR FLT.