As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PHX - AIR TURNBACK - ENROUTE FROM PHX TO BWI THE CREW GOT EICAS STATUS MESSAGE L ENG PROBE HEAT; DUE TO ICING CONDITIONS THE A/C RETURNED TO PHX. MAINTENANCE TROUBLESHOT IAW FIM 30-34-00 AND REPLACED THE FOLLOWING RELAYS: K178, K10107, K10337 (ALL P/N BACR13CG2A) AND K10478 (P/N 770-540-1); THE MESSAGE CLEARED AND FUNCTIONAL CHECKS WERE NORMAL.