As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4232 - AFTER TAKEOFF, THE LEFT ENGINE INTAKE HEAT FAILED. AIRCRAFT RETURNED TO BOS DUE TO WEATHER CONDITIONS. MAINTENANCE FOUND THE LEFT INLET PROTECTION DEVICE HAD FAILED. UNIT WAS REPLACED AND AIRCRAFT WAS RETURNED TO SERVICE. (M)