What was found
AIRCRAFT WAS IN BASE MAINTENANCE: AIRCRAFT FAILED FUNCTION CHECK FLIGHT DUR TO AT TAKEOFF THRUST, THE RIGHT ENGINE STABILIZED AT 98)? N1 AND LEFT ENGINE AT 90)? N1, AS L THROTTLE WAS ADVANCE TO MATCH, DID NOT ACHIEVE 98)? IN CLIMB, BOTH THROTTLES ACHIEVED COMMANDED CLIMB POWER. BOTH ENGINES ACHIEVED CLIMB THRUST UNTIL ENGINE ANTI-ICE APPLIED THEN THE SPLIT OCCURRED. L)(93)? N1 WITH R)(97)? N1. ADVANCED L ENGINE AND N1 DID NOT ACHIEVE COMMANDED N1. REPLACED HYDROMECHANICAL UNIT (AALA202002169019) AND FUEL PUMP (AALA202002179016) ON LEFT HAND ENGINE PER TASK CARD 73-94-121 AND AMM 73-11-01.