What was found
NR 2 ENGINE AT N1 POWER SETTINGS, BETWEEN 69 - 73 PERCENT, HAD STEADY VIBRATION OF 1.5 AT MULTIPLE ALTITUDES, FL 400 DOWN TO 15,000 FT. THE VIBRATION WAS FELT IN THE FLIGHT DECK. ACFT GROUNDED. PERFORMED TEST 14B, FAN TRIM BALANCE. NR 2 ENGINE BALANCE SOLUTION, NR 1 P12 CHANGED TO P14, NR 2 P04 CHANGED TO P08, NR 5 P12 CHANGED TO P14, NR 30 P13 CHANGED TO P14, NR 33 P14 CHANGED TO P08, NR 34 P11 CHANGED TO P14 IAW AMM 71-00-00-750. PERFORMED TEST 7, VIBRATION SURVEY IAW AMM 71-00-00-700. VIBRATION CHECKED GOOD.