As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 509 EWR-FLL, CREW DECLARED EMERGENCY DUE TO YELLOW HYD SYSTEM LOW QTY INFLIGHT ALL FLUID LOST PUMP, TURNED OFF IMMEDIATELY. REMOVED AND REPLACED NR 2 ENGINE CASE DRAIN LINE IAW MM 29-13-49. PERFORMED LEAK CHECK DURING ENGINE DRY MOTOR. NO LEAKS NOTED.