As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - FLT 817 - 'B' SYSTEM LOW QUANTITY LIGHT CAME ON SHORTLY CAME ON SHORTLY AFTER TAKEOFF, LOST 'B' SYSTEM PRESSURE LANDED AT MCI UNEVENTFUL. FOUND HYDRAULIC FLEX LINE AT ELEVATOR CENTERING UNIT RUPTURED, INSTALLED TEMPORARY FLEX LINE PER GMM 14-00 PAR B. (M)