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 HARDWARE INSPECTION AND FAN LUBE REQUIRED. ACFT GROUNDED. PERFORMED FAN BLADE LUBE IAW T/C 78472002. REPLACED ALL 24 PLATFORM RUBBER SEALS, DISBONDED FROM PLATFORMS. PERFORMED VIBRATION SURVEY TEST 7 IAW AMM 71-00-00-700-814-F00 WITHIN LIMITS IAW AMM ENGINE OPERATION LIMITS IAW 71-00-00-800-804-F00, PARA L STEP 4. NO WEIGHTS CHANGED.