What was found
GEAR DISAGREE ON RETRACTING GEAR AT 220 KTS. AT FLAPS 0, HYD PUMPS IN AUTO 3B TO ON. MESSAGES ENCOUNTERED DURRING GO AROUND. (MOC NOTE GO AROUND WAS FOR UNSTABLE APPROCH) *****AIRCRAFT REMOVED FROM SERVICE******** CW M ACTION FOR MEL 32-30-01 REF 359659/3 FOR MEL CLEANED P3GA SENSOR AND TARGET, PERFORMED MULTILPLE EXTENSION AND RETRACTION CHECKS IAW AMM 32-30-00-05. COULD NOT DUPLICATE FAULT. OPS CHECK GOOD. NO INPUT ERROR WITH GEAR UP. REMOVED PLACARD AND FROM MEL.