As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT IDG DRIVE LIGHT CAME ON STEADY DURING CLIMB AT APPROX 10,000 TO 12,000 FT. WHEN THE DRIVE LIGHT CAME ON IT WAS ACCOMPANIED BY A VIBRATION. WHEN THE IDG WAS DISCONNECTED THE VIBRATION ENDED. REPLACED OVHD PUSH BUTTON SWITCH & RT IDG.