As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLIGHT, CA AND FO NOTICED A STRONG BURNING SMELL, LIKE BURNING RUBBER AND PLASTIC. FLIGHT WAS DIVERTED AND MADE AN UNSCHEDULED LANDING. MAINTENANCE WAS DISPATCH AND PERFORMED THE INSPECTION WITH NO DEFECTS NOTED AND A GROUND PERFORMANCE RUN. NO SMELL WAS NOTED DURING THE GROUND RUN. THE AIRCRAFT THEN DID A MAINTENANCE CHECK FLIGHT, WHICH WAS SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.