What was found
DURING FLIGHT AT FL 430, STARTING FEELING A VIBRATION & HEARING A SOUND THAT EVENTUALLY TURNED INTO A RUMBLING SOUND. AFTER A FEW SECS HAD A CAS MESSAGE SHOWING "HYD VOLUME LOW B", A CAS SHOWING "HYD PRESS LOW B", & CAS MESSAGE "HYD PUMP FAIL B". LOOKED AT SYNOPTIC HYD PAGE & COULD SEE THE HYD SYS B RESERVOIR WAS EMPTY. FOLLOWED THE HYD VOLUME B EMERGENCY PROCEDURE. REMOVED AND REPLACED R/H ENGINE DRIVEN HYD PUMP DUE TO LEAKING OUT THE BODY OF THE PUMP. OPS CHECKS LEAK CHECKS GOOD, PERFORMED HYD SYSTEM BLEED, RESET EMERGENCY GEAR HANDLE, ALL WORK DONE I.A.W. CE-700 AMM CH 29-10-05