What was found
AFTER 27 MINUTES IN FLIGHT FROM SAN JUAN, PR, WITH DESTINATION MIAMI, FL, THE CREW DESCRIBED THE PROBLEM AS: IN CLIMB-OUT OF 10,000 FEET, GOT LOUD BANG AND ACFT YAW. NR 1 EPR DOWN AND EGT APPROACHING 600 CELSIUS. SHUT ENGINE DOWN AT 17037 AND RETURNED TO SJU. ACFT THREE ENGINE FERRIED TO MIAMI. NR 1 ENGINE REMOVED AND REPLACED.