What was found
CAPTAIN NOTIFIED DISPATCH & MX THAT THE EMER BRAKE ACCUMULATOR & HYD SYS 2 LEVEL DROPPED 8%. CA MENTIONED THAT HE WOULD DECLARE EMER INBOUND FOR PRECAUTIONARY MEASURES. DURING FLT SYS 2 HYD QTY DROPPED FROM 70% - 56%. SERVICED SYS 2 HYD FLUID IAW AMM 12-12-01. SYS 2 HYD EMER ACCUMULATOR PRESS DROPPED FROM 2300 PSI - 1950 PSI DURING FLT. SERVICED EMER ACCUMULATOR 1 & 2, LOW AT 200 PSI - 650 PSI IAW AMM 12-12-05. NR 1 HYD SYS LOSING PRESS ON ELEC PUMP 1 WHILE MOVING FLT CONTROLS. REMOVED HYD PUMP 3B, PN 51166-03, SN K2709. INSTALLED HYD ON SYS 3B, PN 51166-02, SN K1735 IAW AMM 29-12-01. WO 2062592 REMAINS OPEN FOR OPS CHECK. OPS & LEAK CHECKED GOOD.