What was found
C HYD QTY EICAS MESSAGE DISPLAYED DURING CRUISE. COMPLIED WITH QRH PROCEDURE, C HYD QTY CONTINUED TO DECREASE, CONSULTED WITH MCC ENROUTE, MONITORED HYD QTY SAW A SLOW BUT STEADY DECREASE DURING DESCENT. COMPLETED QRH PROCEDURE. DURING ALTERNATE FLAP EXENSION, T/E FLAP DISAGREE EICAS MESSAGE DISPLAYED AT FLAPS 5. COMPLETED QRH PROCEDURE RESULTED IN A FLAPS 5 LANDING. REMOVED AND REPLACED LEFT ELEVATOR CENTER PCA IAW AMM 27-31-05. OPS AND LEAK CHECKED NORMAL.