TC reported TIMS showed train door at Front DT car 'A3' door. Fault self-cleared and did not recur a t subsequent stations. Staff(SBW) checked and confirmed Fron t DT car 'A3' door has strong vibrations when door is openin ~~~~~ 3606 TC reported TIMS showed train door at Front DT 'A3' door. Fault self-cleared and did not recur at subsequent stations. Staff(SBW)checked and confirmed.  FC 062 - Saloon door A3 Open operation. Found 3606 A3 RHS Door outer roller delaminated - Replaced. Clean J-Rail & guide rail. Checked weather strips - OK. Performed push/pull - OK. No wobbling during movement. No FOD Found. Door function & static test - OK. The door lock switch, line flush with surface. DIR indication not lit. Door gap 63.5mm. Sugu/Anand/Kamal/Lee PT. 45110