As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND TEH AIRCRAFT RETURNED TO CLT. ODOR/BURNING SMELL IN REAR OF CABIN. ODOR REACHED FLIGHT DECK AND CONTINUED TO GET VERY STRONG (NO SMOKE). ALSO HAD SLIGHT ACRID ELECTRIC SMELL. NOTED PASSING 14000FT AFTER AIRBORNE. THE AIRCRAFT LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE AFT GALLEY EXTRACT FAN BINDING AND PRODUCING A BURNING SMELL. THE EXTRACT FAN WAS REPLACED PER AMM 21-23-51.