What was found
WHITE SMOKE AND FUMES FROM AFT RT PASSENGER OVERHEAD VENT. IMMEDIATELY RETURNED AND UNEVENTFUL LANDING AT DEPARTURE. FOUND AUX HEAT HEATER ODOR, PLACARDED AUX HEAT SWITCH INOPERATIVE IAW MEL 21-20.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
WHITE SMOKE AND FUMES FROM AFT RT PASSENGER OVERHEAD VENT. IMMEDIATELY RETURNED AND UNEVENTFUL LANDING AT DEPARTURE. FOUND AUX HEAT HEATER ODOR, PLACARDED AUX HEAT SWITCH INOPERATIVE IAW MEL 21-20.