As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 HYDRAULIC SYSTEM WAS OBSERVED TO BE AT ONE GALLON DURING DESCENT. THE EMERGENCY CHECKLIST WAS ACCOMPLISHED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 HYDRAULIC SYSTEM BALANCE VALVE LEAKING. THE BALANCE VALVE WAS REMOVED AND REPLACED, THE NR 2 HYDRAULIC SYSTEM WAS SERVICED, LEAK AND OPERATIONAL CHECKS WERE GOOD.