As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED LOUD CLUNKING SOUNDS WHILE IN CLIMB, CRUISE AND DESCENT. THE CABIN TEMPERATURE WAS REPORTED AS BEING HIGH AND A BURNING PAINT SMELL WAS NOTED WHEN THE WING ANTI-ICE HEAT WAS OPERATING. MAINTENANCE REPLACED THE FLOW INCREASING VALVE. SATISFACTORY OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RETURNED TO SERVICE.