What was found
IAH - FLT 3366 - DURING FLIGHT, THE CREW REPORTED A THUMPING NOISE AND, ENGINE SURGES COMING FROM THE NR 1 ENGINE. THE CREW PERFORMED A PRECAUTIONARY ENGINE SHUTDOWN AND THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT. MAINTENANCE INSPECTED THE NR 1 ENGINE AND FOUND AN UNACCEPATABLE AMOUNT OF DEBRIS ON THE ENIGNE CHIP DETECTOR. MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)