As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEX - FLT 3390 - IN CRUISE, THE NR 2 ENGINE HYDRAULIC PUMP CAUTION LIGHT ILLUMINATED AND THE NR 2 HYDRAULIC QUANTITY AND PRESSURE INDICATIONS WERE AT ZERO. THE CREW PERFORMED QUICK REFERENCE PROCEDURES AND RETURNED TO DTW. MAINTENANCE REPLACED THE NR 2 HYDRAULIC PUMP. SYSTEM OPERATED SATISFACTORILY. (W)