As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT HYD ELECTRIC DEMAND PUMP EICAS MESSAGE AFER ENGINES START. AIRCRAFT BACK TO BLOCK AND GROUNED BY MAINTENANCE. MAINTENANCE INPECTED RIGHT HYDRAULIC SYSTEM AND FOUND NO DEFECTS. PREFORMED OPERATION CHECK OF THE RIGHT HYD DEMAND PUMP OPS CHECK GOOD IAW AMM 29-16-00. AIRCRAFT RETURNED TO SERVICE.