As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NO: MGE305. EVENT (AIR RETURN) - L HYD QTY EICAS MSG, FOLLOWED BY COMPLETE LOSS OF HYDRAULIC FLUID AND PTU STATUS MSG. ALT GEAR AND FLAP EXTENSION PERFORMED. ON THE GROUND, FOUND LOWER HYDRAULIC FLEX LINE ON NLG DOOR ACTUATOR LEAKING. R/R FLEX LINE AND CONFIRMED NO LEAKS DURING OPS CHK. AIRCRAFT RETURNED TO SERVICE.