As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
2 ENGINE TREND DATA SHOWS AN INCREASE IN LOW PRESSURE ROTOR VIBRATION LEVELS. DATA SCATTER INDICATES FAN LUBE REQUIRED. GROUNDED - YES. ACCOMPLISHED T/C 78472002 ON NR 2 ENG. REPLACED ALL PLATFORMS, SHIMS AND NR 12 AND 24 BLADES. REMAPPED BLADES PER BLAMAP VERSION 3.0 VIBE SURVEY TO BE ACCOMPLISHED ON T/C 78472002.