As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL DESCENT THRU FL31, GOT LOW PRESSURE LIGHT ON A-HYD SYSTEM AND ELEV FEEL LIGHT. SYS-A HYD PRESSURE WAS ZERO AND HYD QTY WAS LOW. FOLLOWED POM PROCEDURES. ON GROUND HYD QTY APPEARED NORMAL. SERVICED HEAD PRESSURE AND CHANGED FILTERS AND CHECKED VALVE.