Snap: 3611 Train door jerking sound when ~~~~~ Open Close speed pass: Yes FOD found: No Door cycle 20x: Yes Rubbing marks: No Door Push/Pull force: 9.5Kgf Door mating gap: 64mm Check Door Lock Switch red line when door closed (should be at half or at most flushed with the step) - satis Door Lock Switch Cushion Rubber intact: Y Door Close Switch distance from actuating plate: 15.0mm Door Wobble: Yes Rectification Actions: Checked and found 3611 B1 door to be wobbly during door operation. Found LHS door outer roller delaminated. Replaced both LHS and RHS door roller to iron roller and function test-smooth. Conducted door static and cyclic test-satis. Done by: Saini, Asruddin, Haslan