What was found
RIGHT ENGINE COMPRESSOR STALL OCCURRED DURING TAKEOFF ROLL AT 70 KNOTS. ABORTED TAKEOFF AND RETURNED TO THE GATE. A .5 INCH LAYER OF SLUSH WAS REPORTED TO BE ON RUNWAY AT TIME OF INCIDENT. MAINTENANCE BORESCOPED 6TH, 7TH AND 13TH STAGE COMPRESSOR, ALL CHECKED NORMAL. ALSO, ENGINE RUN CHECKED GOOD.