As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOS - FLT 4745 - CREW REPORTED THAT DURING FLIGHT WHEN ANTI-ICE SYSTEM TURN ON THEY NOTICED A BURN ODOR IN THE COCKPIT. WHEN THE ANTI-ICE SYSTEM WENT OFF THE ODOR WENT AWAY. BOS MAINTENANCE RAN ENGINES IAW AMM AND COULD NOT DUPLICATE THE ODOR. AIRCRAFT RETURNED TO SERVICE. (M)