As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 281; PHX - SJC - IN CRUISE FLIGHT, THE A/C LOST YELLOW HYDRAULIC PRESSURE AND QUANTITY INDICATION. THE CREW DIVERTED TO LAS FOR MX. MX DISCOVERED THAT THE YELLOW HYDRAULIC SYSTEM ACCUMULATOR WAS LEAKING. MX REPLACED THE YELLOW SYSTEM ACCUMULATOR, OPS CHECK WAS GOOD.