As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 5739 - SEVERE VIBRATION IN FLIGHT FOLLOWED BY A LOSS OF HYDRAULIC PRESSURE ON NR 1 ENGNIE AND ASSOCIATED MAIN HYDRAULIC RESERVOIR LOW INDICATION. MAINTENANCE INSPECTED AND FOUND THE INBOARD HIGH PRESSURE FILTER LINE BROKEN AND NR 1 HYDRAULIC PUMP SHAFT SHEARED. REMOVED AND REPLACED LINE AND NR 1 HYDRAULIC PUMP. SYSTEM OPS CHECKED GOOD. (M)