What was found
CENTER HYD QTY EICAS DURING CLIMB. QTY FLUX BETWEEN ZERO & FULL. HYD PRESS REMAINED NORM PLACE CENTER HYD QTY INDICATION EICAS. ON MEL PLACED CENTER HYD. QTY. INDICATION EICAS. ON MEL, QTY DDP C/W. OK TO DEFER CENTER QTY INDICATION PER MEL. CHECKED WIRES FROM D2598A A13 TO PIN 3, B13 TO PIN 4, C13 TO PIN 5 ON D2540 THAN PINS 3,4,AND 5 TO GROUND, NO FAULTS NOTED, MEGGED ALL WIRE, CHECKED GOOD WITH NO FAULTS, CHECKED D2598A B13 TO PIN 7 ON D2540 & MEGGED, NO FAULTS. CHECKED B13 TO C10 NO CONTINUITY FOUND, MEGGED SAME NO FAULTS FOUND, SUSPECT BAD QTY TRANSMITTER. REMOVED UNSERVICEABLE CENTER HYD RESERVIOR TRANSMITTER & INSTALLED SERVICEABLE ONE IAW AMM. COMPLETED TRANSMITTER INSTALL IAW 29-33-01. OPS CHECK GOOD.