As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 441 - IMMEDIATELY AFTER TAKEOFF DFW, A BURNING SMELL IN THE CABIN WAS REPORTED. AIRCRAFT RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED APU AND ACCOMPLISHED PACK BURNOUT AND LEAK CHECK. NO SMELL OR SMOKE NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)