Train doors at car 1532 A4door was notproven closed. TC recycled train doors twice - ok. Fault di d not recur at subsequent stations. Train doors at car 1532 A4door was not proven closed. TC recycled train doors twic ~~~~~ 1532 A4 Train doors was not  proven closed. TC recycled train doors twice - ok. Fault did not recur at subsequent stations. OE request 1532 A4 train door operational check.  531/532 ER D/L & found no abnormalities at 2017 hrs when occurred. Checked For FOD & weather strip - OK. Door resistance test found both door leaf vibrate badly. Found the !st roller of each door leaf damaged. OPS 20 raised to remove both door leaf to replace rollers.  Au TK 44795 To c/o both door leafs door rollers.  1532 A4 saloon door removed both door leafs & found the door rollers damaged. Replaced the door rollers & cleaned the J-rail. Function check & test - All OK. No DIR.  Alan/Kamarul 44797