What was found
NR 2 ENGINE THRUST REVERSER "UNLOCKED" ECAM ILLUMINATED ON TAKEOFF AT 90 KTS, REJECTED TAKEOFF. PERFORMED CDU POSITION SWITCH MODULE FUNCTIONAL CHECK, NO DEFECTS NOTED. CHECKED LT AND RT TRANS GAPS, ALL IN LIMITS PER MM 78-31-00-05. CW CDU INSPECTION PER MM 78-31-01-06, NO DEFECTS NOTED. CW CDU ADJ/TEST PER MM 78-31-01-05, NO DEFECTS NOTED. THRUST REVERSER OPS CHECKED NORMAL. NO CODE 270/19 CODE LISTED. REMOVE AND REPLACED NR 2 THRUST REVERSER.