As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER FUEL PRESSURE ISSUE, RTFL. AT FL390 LEVEL OFF BOTH CTR FUEL PRESS LIGHTS BEGAN RAPID ASYNCHRONOUS FLASHING 10K IN CTR. NO ASSOCIATED EICAS MESSAGE TROUBLESHOT IAW FIM AND REPLACED FQIS PROCESSOR M121 IAW MM. PERFORMED OPS TEST IAW MM. ALL CHECKED GOOD, NO FAULTS RECORDED.