As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DEN - FLT 546 - AFTER TOUCHDOWN, FLIGHT CREW REPORTED A-SYSTEM HYDRAULIC PRESSURE FLUCTUATING AND LOSS OF NOSE WHEEL STEERING. TOWED AIRCRAFT TO GATE. REPLACED LEFT HYDRAULIC SHUT OFF VALVE, CASE DRAIN FILTER AND PRESSURE FILTER AND SYSTEM CHECKED OKAY. TOTAL TIME AIRFRAME, 69,487.3 HRS.