What was found
(CAN) THE PILOT WAS ON THE RUNWAY GETTING READY TO TAKEOFF. BOTH ENGINE THROTTLES WERE PUSHED TO MAX CRUISE BUT ONLY RT ENGINE WAS REACTING. AFTER 5 SEC WITHOUT ANY RESPONSE FROM LT ENGINE THE PILOT REVERT THROTTLES TO IDLE. AFTER SUCCESSFUL ENGINE GROUND RUNS AND WITHOUT ANY FAULT LIGHTS AND/OR FAULT CODES ON THE COCKPIT DISPLAY, THE PILOTS ELECTED TO RESUME THEIR FLIGHT PLAN AND HAD AN UNEVENTFUL FLIGHT.