Counter bound T409 reported 'B' side headlight not working. TC stepped out and confirmed 'B' side no t working. Train was replaced with a spare train from UPD atJUR. ~~~~~ 3713 Counter bound T409 reported 'B' side headlight not working. TC stepped out and confirmed 'B' side not working. Train was replaced with a spare train from UPD at JUR.  3713 faulty headlamp replaced & tested - OK. Sarma/Kamar 44893