Kishanganj Station doesnt have any terminal/pit line facility...So for maintenance purpose train is brought to NJP..its not related to Reserved/Unreserved.....its an empty rake of 15715 Garib Nawaz which is brought via TMH....but as per July TT,it will start running via BORA,NAK & no longer bear the 05715 No..That is the rake will have Normal Numberings 15715