What was found
(CAN) DURING FINAL APPROACH THE ACFT ENCOUNTERED A YELLOW HYDRAULIC FAILURE MESSAGE. AS A PRECAUTION, THE FLIGHT CREW INITIATED A GO AROUND AND DECLARED AN EMERGENCY FOR THE SUBSEQUENT LANDING. THE EVENTUAL LANDING WAS OTHERWISE UNEVENTFUL WITH NO ADVERSE PASSENGER REACTION. EMERGENCY VEHICLES DID MEET THE FLIGHT AND FOLLOWED THE ACFT TO THE GATE. THE ACFT WAS ABLE TO TAXI NORMALLY. RESOLUTION DURING INSPECTION FOUND HYD. PUMP, YELLOW, ENG NR 2 LEAKING. RT ENGINE HYD PUMP REPLACED IAW AMM 29-13-51 PB401.