As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER DEPARTURE, CREW REPORTED YELLOW HYD QTY WENT TO ZERO. FOLLOWED QRH PROCEDURES AND CONTINUED TO DESTINATION. DECLARED AN EMERGENCY. LANDED WITHOUT INCIDENT AND TAXIED TO THE GATE. MAINTENANCE R & R YELLOW HYD SYS PRIORITY VALVE IAW AMM 29-13-33-000-001-A. OPS AND LEAK CHECKED GOOD IAW TASK 29-13-00-810-801-A. ENGINE HYD SYS WAS IMMEDIATELY SHUT OFF ON FAULT. SYS DPI'S CHECKED NORMAL.