What was found
FLT 574 - MEM - AFTER DEPARTURE, THE NR 2 ENGINE FAILED SHORTLY AFTER LEVELING OFF AT 11,000. POWER WAS SET AT 14,200 TEMP 770. ENGINE RPM DECREASED RAPIDLY WITH NO WARNING. TEMP PEAKED A 920 BEFORE CONDITION LEVER WAS PLACED IN FEATHER. POWERPLANT WAS OPERATING NORMAL PRIOR TO FAILURE. EMERGENCY DECLARED AIRCRAFT RETURNED TO MEM AND UNEVENTFUL LANDING MADE. ENGINE FAILURE UNDER INVESTIGATION. ENGINE S/N 40135 WAS REMOVED AND REPLACED WITH A SERVICEABLE ENGINE AND THE AIRCRAFT RETURNED TO SERVICE. THE DAMAGED ENGINE AT THIS TIME IS BEYOND ECONOMICAL REPAIR. (M)