As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, CREW REPORTED A LOW HYDRAULIC SYSTEM A. AN EMERGENCY WAS DELCARED, AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS GROUNDED. FOUND THE RT SPOILER INBOARD O-RING DAMAGED. REPLACED THE O-RING IAW 27-61-11. NO LEAKS NOTED. SERVICED HYDRAULIC SYSTEM TO PROPER LEVEL.