The rear loco is dead but not defective. It is being taken by the Jabalpur Nagpur passenger towards Nainpur so that some other loco with overdue maintenance schedules can be freed up to go to Motibagh. I am told sometimes trains need the power of twin locos on the hilly stretch between Nagpur and Chinddwara. Ramakona, November 2003. By Alok Patel.