Train doors at car 1701 were not provenclosed. TC recycled train doors thrice - ok. Staff(BGB) chec ked and confirmed no train doors abnormalities. Fault did no t recur at subsequent stations. ~~~~~ FC 933, B4 saloon door CLE Open Close speed pass: Yes FOD found: No Door cycle 20x: Yes Rubbing marks: No Door Push/Pull force: 5.6Kgf 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: No Rectification Actions: Checked fault history and found 11/9/23 DCP was swapped from A4 to B4. Postulate fault transferred and replaced DCP. Function test -ok. Notification to CSC: 2531397 Done by: Kamal