What was found
ON DESCENT HYD RT CWP LIGHT ILLUMINATED. HYD PANEL SHOWED RESERVOIR CONTENTS, UPPER RED. LT & RT FLUID TEMP 70 DEG, MAIN SYS 3000 PSI. SHORTLY THEREAFTER BOTH HYD LT & HYD RT CWP WARNING LIGHTS ILLUMINATE. HYD PANEL SHOWED RESERVOIR CONTENTS LOWER RED. FLUID TEMP 80 - 90 DEG, MAIN SYS PSI DECREASING. CREW COMPLETED EMER CHECKLIST, MAINTAINED FULL CONTROL OF ACFT. DECLARED EMER & LANDED WITHOUT INCIDENT. ACFT WAS SHUT DOWN ON TAXI WAY M & TOWED TO MX LOCATION AT RAMP. FOUND LEAK ON HYD PUMP. PUMP WAS REPLACED & OPERATIONS CHECKED SATISFACTORILY. ACFT RETURNED TO SERVICE WITHOUT FURTHER INCIDENT.