As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN REPORTED HYD SYS QUANITY DROPPING, DECLARED AN EMERGENCY LANDING AND RETURNED TO BASE RE-SECURED FITTING ON HYD LINE. FROM 5102JM HP FILTER MODULE ON GREEN HYD SYS ACCUMULATOR. LEAK CHECK GOOD IAW TSM 29-11-00. OPS CHECK GOOD IAW AMM 29-00-00. SERVICED GREEN SYS IAW AMM 12-12-29. DPI INDICATION OK. ENGINE RUN COMPLETED BY CREW. NO FAULTS NOTED.