TC reported TIMS showed obstacle detected at car 1612 'A3' door. Staff(BSH) checked and confirmed ca r 1612 'A3' door did not opened. Staff(BSH) monitor the trai n door from BSH NB to YCK NB to no available. Staff(YCK) put ~~~~~ 1612 TC reported TIMS showed obstacle detected at A3 door. Staff(BSH) confirmed 1612 'A3' door did not opened. Staff(BSH) monitor the train door from BSH NB to YCK NB to no available.  1612 A3 door checked/found door rollers delaminated. OPS 20 raised to replace rollers.  Celine Tan 45072 To replace rollers.  1612 A3 door did not open. Found #1613 A3 door LHS outer roller delaminated. Replaced #1613 A3 door both LHS/RHS outer/inner rollers. Test door timing, weather strip & door gap (63.5mm) - OK. No DIR lit up when doors were closed.  Kamarul/Shafie/Alan/Lee PT/Sugu 45072