Pax feedback to staff(WDL) that one of t3625he train doors did not opened at car 2625. Staff(CBR) confir med and isolated the defective 'A3' doors at car 2625 in clo sed position. ~~~~~ 1625 Pax feedback to staff(WDL) one train doors did not opened. Staff(CBR) isolated defective 1625 A3 doors in closed position.  1625 no FC registered. Found A3 LHS outer roller delaminated. No FOD Found. Clean J-rail & guide rail. Replaced all 4 door roller. Door Gap 6.3-7mm. Door cyclic test for open/close for proven close - OK. Checked weather strip - OK. Checked 2625 A3 door for FC - N . Sarma/Kamar/Anand 45471