As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT ENGINE FAN VIB UP TO 3.4 ON CLIMB FROM FL 390 TO 410. NO VISIBLE MOISTURE. REDUCED VIB ON LEVEL OUT. PERFORMED FIM 71-05 FT 853. PER NOTE 1 AT TRANSIENT ENGINE SPEED VIB LEVELS CAN SPIKE THEN LEVEL. VISUALLY CHECKED MAIN CHIP DETECTOR, FOUND NO CONTAMINANTS. ALSO VERIFIED ROTOR AND FAN BLADES HAVE NO DEFECTS. ENGINE OK FOR CONTINUED SERVICE.