As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE MAIN HYD LIGHT ANNUNCIATOR ILLUMINATED, THE LT AND RT HYD PUMP LIGHTS STARTED TO ILLUMINATE AND MAIN HYD PRESSURE DROPPED. CHECK LIST FOLLOWED AND UNSCHEDULED LANDING PERFORMED WITHOUT INCIDENT. GEAR EXTENDED NORMALLY, EMERGENCY BRAKES WERE USED FOR FINAL STOP. MAINTENANCE EVALUATION FOUND HYDRAULIC FLUID COMING FROM LEFT ENGINE HYDRAULIC PUMP TO PYLON HIGH PRESSURE LINE P/N SBJ10552-503 CHAFED THROUGH FROM CONTACT WITH HYD PUMP CASE DRAIN LINE.