What was found
ATB - IN FLIGHT RECEIVED HYD B RSVR LO LVL ECAM HYDRAULIC QTY IN BLUE SYSTEM WAS AMBER NEAR EMPTY, SHOTRLY THERE AFTER ALSO RECEIVED HYD B RSVR LO AIR PR. // FOUND BLUE HYD SYS. ENGINE DRIVEN PUMP SHAFT SHEARED. REMOVED AND REPLACED BLUE HYD EDP PER AMM 29-12-51 UP TO STEP 4(B) AMM 29-12-51-400-801-A STEP 4 C) PRESSURIZE BLUE HYDRAULIC SYSTEM. COMPLETED AMM 29-12-51-400-801-A, OPS & LEAK CHECK GOOD OK FOR SVC. NEED TO FLUSH BLUE HYDRAULIC SYSTEM PER AMM 12-36-29-170-808-D. PERFORMED AMM 12-36-29-170-808-D PROCEDURES 4A OPS & LEAK CHECK GOOD. OK FOR SVC.