What was found
DURING LANDING ROLLOUT, THE NR 1 AND NR 3 ENGINES EXPERIENCED REVERSE STALL SIMULTANEOUSLY. BOTH ENGINES WERE SHUT DOWN DUE TO INCREASING EGT AND AIRCRAFT TAXIED TO GATE WITHOUT FURTHER INCIDENT. MAINTENANCE PERFORMED BORESCOPE INSPECTION OF THE NR 3 ENGINE AND NO DISCREPANCIES WERE FOUND. VISUAL INSPECTION OF THE NR 1 ENGINE WAS NORMAL AND BORESCOPE WILL BE ACCOMPLISHED WITHIN FIVE CYCLES. REPLACED TT2 SENSOR ON THE NR 1 ENIGNE, LEAK CHECK WAS NORMAL.