What was found
DURING TAKE OFF ROLL, CREW FELT A YAW, AND FELT THE ENGINE SURGE THREE TIMES. ABORTED TAKE OFF. RAN BOTH ENGINES AND PERFORMED LOW POWER SURGE MARGIN DEMONSTRATION TEST PER RI 43-528033-14 REV. ORIGINAL. NO SURGES WERE DETECTED. NO STALL MESSAGES WERE DISPLAYED. ACFT IS OK FOR SERVICE.