As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMBOUT FROM PHX, CREW REPORTED TO DISPATCH THEY LOST THE YELLOW HYDRAULIC SYSTEM. CREW DECLARED AN EMERGENCY AND RETURNED TO PHX. FLIGHT LANDED WITHOUT INCIDENT. FOUND NR 2 PYLON HYD PRESSURE LINE CHAFED. R & R HYD LINE, LEAK CHECKED GOOD. CHECK OF EXTERIOR LEAKS OF HYD COMPARTMENT IAW AMM TASK 29-00-00-790-001-A. OPS CHECK OF YELLOW HYD SYS GOOD IAW AMM TASK 29-13-00-710-002-A.