As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: DECLARED EMERGENCY INTO PHL ACCOUNT LOSS OF BLUE HYDRAULIC FLUID (HYD. B RSVR LO LVL). CASE DRAIN CRACKED UNDER PANEL 452 BL. ACCOMP. REPAIR ON HYDRO CASE DRAIN LINE IAW AMM 20-23-11-300-801-A. BLED BLUE HYDRO SYS IAW AMM 29-00-00-870-805-A. LEAK CK. OF REPAIR GOOD.