What was found
DURING CRUISE FLIGHT AT 41,000 FEET, THE RT ENGINE APPARENTLY HAD HP BLADE FAILURE RESULTING IN IN-FLIGHT SHUTDOWN. OPERATOR DECLARED EMERGENCY AND HAD UNEVENTFUL LANDING AT TUL. DISASSEMBLY OF ENGINE CONFIRMED THE FAILURE. LOT NRS 4161, 4191, AND 4266. NOTE: SB 72-3494 HAD BEEN C/W AND SETS LIFE LIMIT AT 4,500 HOURS ON THIS PART.