As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C 8309 DIVERTED TO DEN DUE TO RIGHT ENGINE N2 VIBS. QRH REQUIRED TO REDUCE THRUST UNTIL VIBS WITHIN LIMITS. REDUCED THRUST VIB INDICATION CLEARED PER QRH OK TO CONTINUE WITH NORMAL ENGINE OPERATION. ALL OTHER INDICATIONS NORMAL. CORRECTIVE ACTION: PER AMP THIS IS A TRANSIENT N2 VIBRATION. CHECKED MCD'S AS PRECAUTION PERFORMED VISUAL INSPECTION A/C RTS. (LP# 9610434)