As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 221 - DEN - AIR TURN BACK, DURING CLIMB-OUT OF DEN, FLIGHT CREW REPORTED B-SYSTEM HYDRAULIC FAILURE. THE AIRCRAFT WAS RETURNED TO DEN WITHOUT INCIDENT. MAINTENANCE REPLACED THE HYDRAULIC LINE FROM THE NR 2 B-SYSTEM MODULE. PERFORMED LEAK CHECK AND SYSTEM CHECKED OK. (M)