TC feedback car 3631, 'B2' door did notopen.SM(MSP) checked & feedback the train door was slow inopening and isolated the door. ERS-10 ~~~~~ At car 3631 B2 both doors outer roller delaminated.
Replaced the rollers and further check:

Open Close speed pass: Y
FOD found: N
Door cycle 20x: Y
Rubbing marks: N
Door Push/Pull force: ok
Door mating gap: ok
Check Door Lock Switch red line when door closed - ok
Door Lock Switch Cushion Rubber intact: Y
Door Close Switch distance from actuating plate - ok
Door Wobble: N
Rectification Actions:
- Replaced delaminated door rollers
- cyclic test ok, door static test ok
- preventively serviced J rail and guide rail.