SPY SHOT1: Flank view of the SAN Engineering made diesel loco for some private firm in Maharashtra. Anil had spotted one of these on another freight a couple of days ago. The Yard Master said that even though this loco was non-running, it is considered to be an engine and hence cannot run dual with a double headed freight. Hence each loco is sent one by one. BYPL Goods Yard, 2004-04-18. By Naren Damodaran.