What was found
(CAN) CREW CARRIED OUT AN AIRTURNBACK DUE TO ELECT 1, SYSTEM B HYDRAULIC PUMP LOW PRESSURE LIGHT ILLUMINATED DURING CLIMB. HYD SYS B ELEC PUMP REPLACED IAW AMM 29-11-21 LEAK CHECKED SERVICEABLE. AS WELL AS HYD SYS B CASE DRAIN FILTER REPLACED IAW AMM 29-11-41 LEAK CHECKED SERVICABLE. PN: 65-90305-58AM BN: 3604956 HYD SYS B ACOUSTIC FILTER REPLACED IAW AMM 29-11-27 LEAK CHECKED SERVICEABLE. PN: 840002-074 BN:3571953 HYD SYS B RETURN FILTER REPLACED IAW AMM 29-11-61 LEAK CHECKED SERVICEABLE. PN:6590305-66AM BN: 3523139 HYD SYS B EDMP PRESSURE FILTER REPLACED IAW AMM 29-11-71 LEAK CHECKED SERVICEABLE. PN:65-90305-15AM BN: 3537114 (TC# 20190412012)