What was found
DURING TAKEOFF ROLL, THE AIRCRAFT EXPERIENCED AN UNDETERMINED ENGINE STALL. CREW ABORTED TAKEOFF AND RETURNED TO THE GATE. MAINTENANCE INSPECTED THE SADDLE DUCT CAPS, PS3 FILTERS, ENGINE INLETS AND OUTLETS ON BOTH ENGINES, ALL AREAS CHECKED OK. TWO TAKEOFF POWER RUNS WERE DONE ON EACH ENGINE AND NO STALLS OCCURRED.