As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION NOTED INCREASED WITH POWER CHG ON ENG NR 2. POWER REDUCED TO IDLE AND AC RETURN TO MEM. SWAPPED AC PACKS WITH NO CHG IN VIBRATION ALL ENG AND HYD IND NORM. *S/D* REMOVED AND REPLACED NR 2 ENG IAW W/C 71T1101 & 71T1701. NR 2 ENG GROUND CKS NORMAL.