What was found
COMING THROUGH 12,000 ON DESCENT FA CALLED US TO NOTIFY US THERE WAS A SMELL OF SMOKE IN THE FIRST CLASS CABIN. WE IMMEDIATELY COULD SMELL THE SMOKE AS WELL. THE FA ALSO SAID THERE WAS A SLIGHT HAZE IN THE 1ST CLASS CABIN AREA. THE SMOKE DISSIPATED A FEW MINUTES LATER AND WE COULD NO LONGER SMELL IT EITHER. C/W NO GO ODI PREVENTION WORK CARD 2120-2367. NO APU CONTAMINATION NO DISCREPANCY'S NOTED. PERFORMED PNEUMATIC SYSTEM DUCT BURN OUT PER 7100-2619 NO SMOKE OR SMELL NOTED A/C OK FOR SRVC. (LP5588124)