As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L ENG FAN VIBRATION @ 4.3 DURING CLIMB - APPROXIMATELY 10 MINUTES FROM FL 200-FL 390.(<P>IAW AMM 71-00-00-862-020-803 PERFORMED FIM 71-05 FT 858 TO SHEET 2 BLOCK 3-25 AND SHEET 3 TO BLOCK 50. NO FAULTS NOTED. PERFORMED FIM 71-05 FT 852 UP TO SHEET 2 BLOCK 5 AND PERFORMED ENG RUN IAW AMM 71-00-00. NO FAULTS NOTED. ALL VIBRATION WITHIN LIMITS IAW AMM 71-00-00-00-862-020-803.</P>)