As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 468 RSW-BOS, CREW DECLARED EMERGENCY AND AIR RETURN TO RSW DUE TO GREEN HYDRAULIC SYSTEM FAILED AFTER TAKEOFF. LOSS OF FLUID FOLLOWED BY YELLOW SYSTEM OVERHEAT TEMPORARLY. QRH COMPLETED MANUAL GEAR EXTENTION. ACCOMPLISHED TSM 29-11-00-810-803-A FOUND LANDING SAFETY VALVE FIN# 49GA FAILED. REPLACED SAFETY VALVE & MANIFOLD PER AMM 32-31-17, OPS & LEAK CHECK GOOD. HYD SYSTEM PRECAUTIONS ACCOMPLISHED, ALSO ACCOMPLISHED TSM 29-13-00-810-802-A YELLOW OVERHEAT, OPS CHECKS GOOD.