What was found
NR 2 ENG VIBRATION, RTFL. PERFORMED TRANSIENT ACOUSTIC PROPAGATION TEST OF NR 2 ENG LP COMPRESSOR FAN BLADES PER AMM. ALL BLADES FOUND WITHIN LIMITS. NR 2 ENGINE, REMOVED INLET CONE AND FAIRING FOR INSPECTION OF BLADE RETAINING RING. CHECKED TORQUE OF BLADE RETAINING RING AND ANNULUS FILLERS. NO DEFECTS FOUND. INSTALLED INLET CONE AND FAIRING. REPLACED NR 2 ENG VIBRATION TRANSDUCER & MONITORING UNIT PER MM. ACCOMPLISHED HIGH POWER VIB SURVEY TEST 8. HIGHEST VIBS INDICATED WAS 0.4 N1 AND 0.5 N2. THE SAMC CONTROLLER AND MANAGER CONCURR THAT THE AIRPLANE CAN BE RELEASED BACK TO SERVICE AFTER EXPERIENCING A DIVERSION OR AIR TURNBACK DUE TO A MECHANICAL REASON. BACK IN SERVICE PER OBPLM.