What was found
FLT 401 BOS-MSY, DIVERTED TO IAD - FUMES BY ROW 2 DESCRIBE AS "BURING IRON" SMELL, RULED OUT LAPTOP / BATTERIES / PED'S. TURNED OFF TV'S AND DIVERTED TO IAD, FUMES SEEMED TO STOP. PERFORMED A VISUAL INSPECTION ON THE PASSENGER CABIN & E&E BAYS. NO SIGNS OF BURNING ODOR, ACFT OK TO CONTINUE SERVICE IRW FIM 21-20-00810-801A.