As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURN BACK - FLT 277 - TAT PROBE FAULTED AFTER TAKEOFF. CREW RETURNED TO PHX AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPAIRED WIRING AT THE AIR/GROUND SYSTEM TWO RELAY (K203) IAW BOEING 757 AMM 20-81-12. OPERATIONAL CHECKS WERE GOOD.