Pax feedback to staff(PNR) that there was an abnormal sound coming from car 1630, A1 door when openi ng and closing. Staff(DVR) escorted the train and checked an d confirmed no abnormalities Pax feedback to staff(PNR) that ~~~~~ 1630 Pax feedback to staff(PNR) of abnormal sound coming from  A1 door when opening and closing. Staff(DVR) escorted the train, checked and confirmed no abnormalities. CE : Throughout cx car 1630 A1 door opening/closing synchronised ok. Escort trn till psr, no abnormalities found. Feedback from TC trn performance ok.  1630 A1 door, no FC. Door roller checked ok. Instead #1630 B3 door found FC 973. RHS outer door roller found delaminated. Replaced with new roller. Cleaned J-rail as preventive measures. Door resistance check ok. Door gap 63mm, Door lock switch ok. Door cyclic test ok.  Alan/Lee PT/Kamarul/Shafie 45221