As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUS - FLT 1171 - EN ROUTE HSV-DFW, ENCOUNTERED SMOKE IN FIRST CLASS CABIN AT 33,000 FEET. ACCOMPLISHED CABN FIRE/SMOKE CHECKLIST. DIVERTED AUS AND LANDED WITHOUT INCIDENT. REPLACED FORWARD CARGO COMPARTMENT HEATER. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)