What was found
NR 2 ENGINE VIBRATION DURING CLIMB OUT, N1 1.5 AS POWER INCREASED, VIBRATION INCREASED. R & R TCC AIR VALVE IAW AMM 75-24. R & R THE ENGINE OIL FILTER AND CHECKED CHIP DETECTORS, NO METAL. PERFORMED LPC BOROSCOPE 6 THRU 17 STAGE. HPT 1-3 STAGE; LPT 3RD STAGE BLADE INSPECTION IAW AMM 72-00. REMOVED, LUBRICATED AND REINSTALLED THE NR 2 ENGINE FAN BLADES. R & R HELICOILS AP 2 AND AP 4. REPLACED THE NR 2 ENGINE FAN BLADE SET IAW 72-31. PERFORMED VIBRATION SURVEY, ENGINE VIBRATION REMAIN AT PERMITTED LEVELS.