What was found
MAIN HYDRAULICS: DURING CRUISE FLIGHT AT FL 430, HYD SYSTEM 2 QUANTITY WENT TO 0%. COMPLETED HYD 2 LO QTY QRH CHECKLIST. SYSTEM PRESSURE WAS HOLDING AT 3000 PSI SO WE CONTINUED ON TO DESTINATION. AFTER APPROXIMATLEY 1 HOUR, HYD SYSTEM PRESSURE BEGAN TO DROP AND WENT TO 0 PSI. ACCOMPISHED HYD 2 LO PRESS QRH CHECKLIST AND LANDED AT NEAREST AIRPORT AS DIRECTED BY PROCEDURE. EVIDENCE OF HYDRAULIC FLUID LEAK EVIDENT IN AFT COMPARTMENT ON POST FLIGHT INSPECTION.