As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE TREND DATA SHOWS A SUDDEN INCREASE IN LOW PRESSURE ROTOR VIBRATION LEVELS. DATA SCATTER INDICATES FAN LUBE AND HARDWARE INSPECTION REQUIRED. ACFT GROUNDED. TASK CARD 78472002, FAN BLADE LUBRICATION ON NR 2 ENGINE ACCOMPLISHED. 24 SHIMS REPLACED.