Staff(NEW) feedback train door #18 did not open. Staff(TAP) checked, confirmed train door #18 unableto open. ~~~~~ Staff(NEW) feedback train door #18 did n   FC 972 Found 1608 B3 RHS main roller delaminated. After change out rollers: 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: Changed out 1608 B3 RHS door outer rollers. Cyclic and static test ok, no further signs of abnormalities. Service J-rail and guide rail. Done by Sateesh and Alauddin 45143