What was found
(CAN) DURING CLIMBOUT AIRCRAFT WAS EXPERIENCING ERRATIC INDICATIONS ON THE NUMBER 1 ENGINE. +/- 4% N1 WHILE AT MAX POWER, INCLUDING A PERIOD WHERE UNABLE TO ACHIEVE GREATER THAN 90% N1 AT MAX POWER, THAN SURGE TO 96%. ALSO FELT A VIBRATION THROUGH THE AIRCRAFT, BUT RECEIVED NO VIB INDICATIONS. CORRECTIVE ACTION: REMOVED AND REPLACED T2 SENSOR IN REFERENCE TO AMM 73-21-11. (TC# 20191004007)