As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4659 - DURING FLIGHT, THE RIGHT INTAKE HEAT FAIL LIGHT ILLUMINATED. DUE TO WEATHER THE FLIGHT DIVERTED BACK TO BOS. THE SYSTEM WAS MEL'D AND THE AIRCRAFT WAS REPOSITIONED TO BGR WHERE MAINTENANCE REPLACED A FAULTY THERMAL CONTROLLER. AFTER PERFORMING ALL REQUIRED CHECKS THE AIRCRAFT WAS RETURNED TO SERVICE. (M)