What was found
AT 4000 FT, AFTER DESCENT, WHEN POWER WAS COMING UP. THE RT ENGINE MADE BANGING SOUNDS WITH VIBRATION OFF THE SCALE. PERFORMED A BORESCOPE, NO DEFECTS NOTED AND PERFORMED FIM 71-05 FT 849. NO DEFECTS NOTED. PERFORMED A MAX POWER ASSURANCE TEST IAW MM 71-00-00, NO DEFECTS NOTED. OPS CHECKED GOOD. THE RIGHT ENGINE CIT SENSOR REMOVED AND REPLACED IAW AMM 73-21-02. ALL TESTED OK.