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 GRADUAL INCREASE IN LOW PRESSURE ROTOR VIBRATION LEVELS. DATA SCATTER INDICATES HARWARE INSPECTION AND FAN LUBE REQUIRED. ACFT GROUNDED. ACCOMPLISHED FAN BLADE LUBRICATION REF TASK CARD 78472002. BLADE PLATFORMS SHOW EVIDENCE OF SHIM CONTACT. REMOVED HIGH SPOTS OF METAL IAW 72-21-02-200-801, STEP L.