What was found
ON CLIMB OUT, RECEIVED RT THRUST REVERSER UNLOCK MESSAGE. COMPLIED WITH QRH, SELECTED EMERGENCY STOW, RT THRUST REVERSER UNLOCK MESSAGE PERSISTS, WITH THRUST LEVER AT IDLE, FELT SLIGHT VIBRATION IN AIRFRAME, NO ABNORMAL N1 OR N2 VIBRATION INDICATIONS. VIBRATION FELT ON CLIMB OUT AT 290 KTS AND VIBRATION STILL FELT. COMPLIED WITH QRH & SHUT DOWN RIGHT ENGINE, ENGINE WAS SHUT DOWN FOR APPROX 40 MINUTES, OIL PRESSURE READ APPROX 1 PSI WHILE ENGINE WAS WINDMILLING. PERFORMED ENGINE RUN, NOTED NO ABNORMAL VIBRATIONS. OPS CHECKED GOOD.