There need to change coach composition of Bihar Sampark Kranti at least it should have 3-Third A.C.(B1-B2-B3), 2-Second A.C.(A1-A2), 1-First A.C.(H1), and 1-First A.C. cum A.C. Second tier(HA1). SL=12, GEN=2, SLR=2, PC, I don't know so many trains has been augmented with A.C. coaches but in this train ECR have removed B2 and putted S13 at the place of B2, I think there is no any financial issue to railway that in such a famous train A.C. coach/seat go vacant then why they removed??? ECR should think on this point they must increase A.C. coaches at least 25% of the rake composition, and also as early as possible they should run this from SPJ-NDLS-SPJ with GZB WAP-7 e-loco, and DBG-SPJ-DBG with SPJ WDM 3D.