As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO BLOCK DUE TO RIGHT HYDRAULIC SYSTEM PRESSURE LIGHT, QUANTITY LIGHT AND EICAS QUANTITY READING 0.03. IRREGULARITY OCCURRED ON RIGHT ENGINE START. FOUND LT WHEEL WELL BRAKE METERING VALVE FAILED. VALVE BODY END CAP SHEARED AWAY FROM COMPONENT. THREE OF FOUR ATTACHING FASTENERS FAILED. REPLACED VALVE, LEAK CKS GOOD.