As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE TREND DATA SHOWS LOW PRESSURE ROTOR VIBRATION LEVELS TO BE TRENDING HIGHER THAT NORMAL AFTER LAST FAN LUBE. TESTED AAVM AND FOUND SCREW LOCATION NR 1 14 30 34 NEEDING REPLACEMENT. REMOVED AND REPLACED BALANCE SCREWS 1 AND 14, REMOVED P11 INSTALLED P14, REPLACED BALANCE SCREWS 30 AND 34, REMOVED P14 INSTALLED P13 COMPLIED WITH AMM 71 00 00 750 803 F00 TEST 14(B).