What was found
PHX - EMERGENCY LANDING - EN ROUTE FROM AUS TO PHX FLIGHT CREW NOTICED A NR 1 ENGINE VIBRATION WITH A SPIKE IN EGT, ALL ENGINE GAUGES LOOKED NORMAL, LANDED AT PHX. DAMAGE NOTED TO TURBINE SECTION, MAINTENANCE REMOVED AND REPLACED THE NR 1 ENGINE PER T/C'S R5M71003 AND F5M71002. VENDOR TEARDOWN OF ENGINE S/N P708323B DETERMINED CAUSE OF FAILURE WAS DUE TO FRACTURED T3 BLADES AIRFOIL. OTHER SIGNIFICANT FINDING INCLUDE: C1, T2 BLADES SCRAPPED FOR NICKS AND CRACKS, T3 & T4 BLADES SCRAPPED DUE TO FRACTURE, T2 DISK, LPT SHAFT, T3 & T4 INNER AIR SEALS SCRAPPED FOR RUBBING, AND T3 & T4 OUTER AIR SEALS SCRAPPED FOR NICKS. ENGINE REBUILT, ALL DEFECTIVE PARTS REPLACED.