Train doors at Rear M1 car were not proven closed. TC recycled train doors once - ok. Fault recur atLVR1. Staff (BGS) on board, checked and confirmed Rear M1 ' B2' train doors was slow in closing. No obstructions found o ~~~~~ Train doors at Rear M1 car were not prov   All doors could be proven closed - unable to duplicate fault. Checked door guide - no FOD. Isolated 1527 B2 door and conducted manual door operation- smooth operation. Conducted cyclic door test and observed 1527 B2 door slightly slow in closing. adjusted door speed to be synchronised with other doors. Conducted 10/20mm gauge test - satis. N.A/KUMAR/AZLAN/01.10.2021