As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF SELECTED GEAR UP AND HYDRAULIC NUMBER THREE LOW PRESSURE CAUTION CAME ON, FOLLOWED BY GEAR UP DISAGREE (BOTH MAIN GEAR). ALSO, NOSE DOOR OPEN WARNING MESSAGE CAME ON. NOTED NUMBER THREE HYDRAULIC SYSTEM FAILURE (3A & 3B PUMP PSI 0). RETURNED TO PSC. REPLACED HYDRAULIC NUMBER THREE RESERVOIR AND BOTH HYDRAULIC PUMPS. CHANGED FILTERS AND LEAK CHECK SYSTEM IAW 29-12-00. JACKED AIRCRAFT AND PERFORMED LANDING GEAR CHECK. OPS CHECK GOOD.