What was found
CABIN CREW REPORTED LIGHT WHITE SMOKE IN THE CABIN, 10 MINUTES BEFORE LANDING. SMOKE APPEARED TO BE MOMENTANEOUS AND NOT APPARENT TO THE FLIGHT CREW. THE SMOKE CAME FROM BETWEEN MEDICAL BEDS AND SIDEWALL. REMOVED THE RT SIDEWALL AS REQUIRED AND INSPECTED FOR EVIDENCE OF HEAT DAMAGE. NO VISUAL SIGNS OF DAMAGE NOTED. INSPECTED HEAT DUCT WORK FOR DAMAGE AND SIGNS OF LEAKAGE OR OBSTRUCTION. FOUND FLOOR REGISTER COMPLETELY COVERED BY FLOORING MATERIAL, REPOSITIONED AWAY FROM REGISTER AND SECURED. PERFORMED OPS CHECK OF AUXILIARY HEATER, NO DEFECTS NOTED. INSPECTED MED BEDS AND ASSOCIATED WIRING, NO DEFECTS NOTED. RAN AIRCRAFT AT HIGH POWER WITH AUX DEFOG AND AUX HEAT ON WITH SIDEWALL REMOVED, NO SMOKE AND NO ODOR NOTED. INSTALLED SIDEWALL AND REPEATED HIGH POWER RUN, NO DEFECTS NOTED. PERFORMED OPERATIONAL CHECK FLIGHT WITH NO DEFECTS NOTED.