As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 2 ENGINE INCREASE IN VIBRATION .8 TO 3.0 IN CRUISE, BOTH CHANNELS. THRUST LEVER RETARDED TO IDLE, VIBRATION .4. LEVER ADVANCED, VIBRATION INCREASES TO 3.0 UNITS. REPLACED ENGINE VIBRATION CONDITIONING UNIT. SWAPPED NR 1 AND NR 2 INDICATORS IAW MM 77-31-00. (M)