As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT A BURNING ODOR OCCURRED WHEN THE ANTI ICE SYSTEM WAS ACTIVATED IN ICING CONDITIONS. PERFORMED OPERATIONAL CHECK OF THE PNEUMATIC SYSTEM AND FOUND NO SMELL OR DEFECTS IN THE SYSTEM AT THIS TIME AND DATE. INSPECTED IAW EMB 145 AMM 36-00-00.