As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#511, JFK-LAS. (AIRCRAFT PERFORMED AN AIR TURN BACK TO JFK) 'FUEL ACT XFR FAULT. ACT TRANSFER BUTTON DID NOT WORK IN MANUEL; T/S IAW TSM 28-28-00-810-803-A. FOUND RELAY 21QH FAULTY. R/R 21QH IAW ESPM 20-46-50. ALL OPS NORMAL. NO FURTHER DEFECTS NOTED AT THIS TIME. A/C OK FOR CONT SVC.'