As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BWI - AIR TURN BACK - FLT 0083 - EN ROUTE FROM BWI TO LAS A WEATHER RADAR FAIL MESSAGE APPEARED INTERMITTENTLY FOLLOWED BY A STRONG ELECTRICAL BURNING SMELL. DUE TO WEATHER EN ROUTE AIRCRAFT TURNED BACK TO BWI. MAINTENANCE REMOVED AND REPLACED THE WEATHER RADAR R/T UNIT IAW 34-43-01. OPERATIONAL CHECK WAS GOOD.