What was found
AIRCRAFT DEPARTED IAD AT 1657 UTC FOR A SCHEDULED TRIP TO TEB IN ROUTE THE, CHECK HYD QTY, CAS MESSAGE CAME ON. THROUGH CHECKLIST PROCEDURES, IT WAS DETERMINED THE FLT SYS HYD QTY WAS LOW & DECREASING. CREW FOLLOWED QRH PROCEDURES & DIVERTED TO BWI. IN FLIGHT EMERGENCY WAS DECLARED, ACFT LANDED WITHOUT ISSUES. TROUBLESHOOTING REVEALED A LEAKING REDUCER FITTING, P2, ON LOWER PORTION OF THE RUDDER SYS DUEL LOAD LIMITER VLV. FITTING WAS FOUND TO HAVE A DEFECT ALLOWING FULL SYS PSI AT FULL FLOW TO ESCAPE. A NEW FITTING WAS ORDERED, INSTALLED & LEAK CHECKED IAW MM ON 1/19/14.