As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA-SUP-ON FLIGHT NUMBER 2328, AFTER TAKEOFF NR 2 HYDRAULIC SYSTEM FAILED. NOSE WHEEL CAME UP THE REST OF THE GEAR DID NOT. FLIGHT RETURNED TO FIELD, CREW DID ALTERNATE GEAR EXTENSION. FLIGHT LANDED WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED FLEX LINE ON NR 2 MAIN LANDING GEAR UPLOCK ACTUATOR. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.