What was found
AC MOTOR PUMP - WITH LOW PRESS LIGHT ILLUMINATED AND EICAS MESSAGE 'C HYD ELEC 2' DISPLAYED AND EICAS MESSAGE 'HYD SYS MAINT' WAS NOT DISPLAYED. REPLACED THE PRESSURE SWITCH, S100016, FOR THE ACMP, C2 IN THE CENTER HYD SYS. CREW COMMENTS: C HYD ELEC 2 CAME ON TWICE FOR APPROX 4 SEC EACH TIME, AOG DID NOT COME IN. REPLACED PRESSURE SWITCH S100016. LEAK CHECK OK, NO MESSAGES OR FAULTS FOUND.