What was found
(CAN) AT FLIGHT LEVEL 33,000 FT A POPPING SOUND FOLLOWED BY ENGINE VIBRATIONS WAS EXPERIENCED. RT POWER LEVER RETARDED SLOWLY AND VIBRATION LEVEL SOFTENED,BUT, STILL NOTICEABLE, ALL ENGINE PARAMETERS WERE NORMAL AND STEADY. AT 73 PERCENT ON DECENT THRU 29000 FT A STRONG VIBRATION BEGAN. THE RT LEVER SET TO 67 PERCENT THE VIBRATION WAS STILL NOTICEABLE. AT 9,000 FT THE POWER LEVER WAS RETARDED TO 58 PERCENT. LANDED AND SHUTDOWN ENGINE. NR 2 STARTER GENERATOR REMOVED DUE TO BEARING FAILURE.