What was found
(CAN) THE OPERATOR REPORTED THAT DURING CLIMBOUT, THE CREW OBSERVED ENGINE VIBRATION INDICATIONS OF 1.7 MILS, PEAKING AT 2.0 MILS. THE VIBRATION WENT AWAY WHEN THE ACFT LEVELED OFF IN CRUISE. THE VIBRATION RETURNED WHEN THROTTLES WERE BROUGHT OUT OF IDLE. IT WAS REPORTED THAT A F/A COULD FEEL THE VIBRATION IN THE REAR OF THE ACFT. AN EMERGENCY WAS DECLARED AND THE ACFT DIVERTED.