As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 190 LAS-JFK, CREW DECLARED EMERGENCY DUE TO HYD YELLOW RESV LO IN CRUISE AT FL350. DUE TO YELLOW HYDRAULIC SYS NOT AVAILABLE, THE NOSE STEERING WAS INOPERATIVE. TECHNICIAN FOUND RUPTURED YELLOW HYDRAULIC PRESSURE RIGID HYD LINE IN NR 2 PYLON AREA. REMOVED AND REPLACED NR 2 ENG YELLOW HYD MAIN PRESS LINE IAW AMM 29-13-49-04. OPS AND LEAK CHECK OK.