What was found
(CAN) DURING TAKE-OFF THE PILOT WAS UNABLE TO MAKE THE REQUIRED EPR ON THE RT ENGINE WITH ANTI-ICE SELECTED. THE PILOT INITIATED REJECTED TAKE-OFF AND ADVISED ATC. SUBSEQUENT TAKE-OFF ATTEMPT FOR NORMAL EPR WAS SUCCESSFUL. UPON ARRIVAL AT THE OTTAWA BASE LOCATION, OUR CONTRACTED AMO COMPLIED WITH AN ENGINE GROUND RUN AND DETERMINED A FALSE EPR INDICATION WAS THE PROBABLE CAUSE. FURTHER INSPECTION OF THE EPR SYSTEM IDENTIFIED A LOOSE FITTING AT THE PYLON LOCATION ON THE LINE ASSY. AN ENGINE PERFORMANCE RUN WAS COMPLIED SATISFACTORILY AND COMPLIANCE OF A DAILY CHECK WAS COMPLETED.