Train doors at Front M2 car 'A2' were not proven closed. TC recycled train doors a few times but to no avail. Staff(TAP) assisted to push close 'A2' doors at Fr ont M2 for train to depart. At BSH NB, affected train door f ~~~~~ Train doors at Front M2 car 'A2' were no     Check and found A2 door both side door roller damage. Change out and do all door test within criteria. Done by Koh.  18/03/23