As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PRIOR TO TAKEOFF, NR 1 SERVO JAM LIGHT CAME ON. NR 1 HYDRAULIC SYSTEM LEVEL HAD DROPPED TO THE REFILL LINE AND ACTIVATED THE LOW LEVEL SWITCH. AFTER REMOVAL OF T/R COWLS, HYD FLUID WAS WIPED UP BUT NO CRACK COULD BE SEEN - FLUID LEVEL WAS TOPPED UP AND A/C WAS GROUND RUN AT 3000 PSI. FLUID WAS LEAKING FROM HYD LINE AT 6 INCHES FROM T/R SERVO. LINE WAS CHANGED AND GROUND RUN CHECKED SERVICEABLE. (PORUS SECTION WHERE LEAK IS, IS NOT VISIBLE TO NAKED EYE). (X)