As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT HAND HPSOV EICAS MESSAGE LIGHT CAME ON DURING FLIGHT. COMPLIED WITH QRH AND RETURNED TO DEPARTURE. EMERGENCY DECLARED, AIRCRAFT LANDED. THE AIRCRAFT WAS GROUNDED. REPLACED HIGH PRESSURE SHUT-OFF VALVE AND HIGH PRESSURE SHUT-OFF VALVE CONTROLLER AS A PRECAUTION PER AMM 36-11-07 AND 36-11-08. HIGH POWER ENGINE RUN PERFORMED. ALL PARAMETERS FOUND TO BE NORMAL. NO MESSAGE NOTED AT THIS TIME. OK FOR SERVICE. THIS SDR IS FOR THE HIGH PRESSURE SHUT-OFF VALVE.