As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 301H, CREW REPORTED WHILE CLIMBING THRU FL 280, BOTH CREW MEMBERS DETECTED AN ELECTRICAL BURNING ODOR. AIR COMING FROM GASPER VENTS WAS CLEAN WITH NO ODOR. AIRCRAFT DIVERTED TO EVV. AIRCRAFT REMOVED FROM SERVICE. PERFORMED NUMEROUS CHECKS IN THE FLIGHT DECK AND OVERHEAD PANELS AND IN THE CABIN. RAN AIRCRAFT. NO FURTHER BURN ODOR NOTED. AIRCRAFT RETURNED TO SERVICE.