As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CAPTAIN REPORTED SLIGHT POWER INCREASE THEN LOUD CRACK/BOOM SOUND WAS HEARD WITH SLIGHT SHAKING IN STICK NO FLUCTUATIONS IN PARAMETERS WERE NOTED. STRONG BURNING SMELL WAS INSIDE CABIN AND COCKPIT WAS THEN NOTED. EMERGENCY DECLARED FLIGHT LANDED DFW WITHOUT INCIDENT. NO FAULTS WERE FOUND. REPLACED LEFT AFT SMOKE DETECTOR IN MID CARGO. SYSTEM GROUND CHECK NORMAL OPERATION.