As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - AT PUSHBACK WHEN BRAKES WERE RELEASED HYDRAULIC FLEX LINE IN LEFT WHEEL WELL RUPTURED. REPLACED LEFT HAND GEAR WHEEL WELL HYDRAULIC LINE IN UPPER SECTION OF LEFT HAND GEAR AFT OF REAR SPAR. SYSTEM GROUND CHECKED NORMAL OPERATION.