As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT IN AREAS OF MODERATE PRECIPITATION THE FLIGHT CREW REPORTS THAT THERE WAS A STRONG HOT PLASTIC ODOR. WHEN THE AIRCRAFT WAS OUT OF A PRECIPITATION AREA THE SMELL WENT AWAY. MAINTENANCE INSPECTED WIRING AND WINDSHIELD HEAT SYSTEM. NO DEFECT FOUNDS. SYSTEM OPS CHECKED GOOD.