As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON CLIMB AT APPROXIMATELY 22,000 FT, CREW NOTICED SPARK ON RT WINDSHIELD AND SHORTLY AFTER GOT A RT WINDSHIELD HEAT MESSAGE. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED, R & R RT WINDSHIELD TEMPERATURE CONTROLLER AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.