Train doors at car 3608 were not provenclosed. TC recycled train doors a few times but to no avail.Staff(TAP) assisted to push close 'B3' door at car 3608 for train to depart. Staff(TAP) monitored the train doors, faul  ~~~~~ L3 3608 Train Door Fault - TAP SB: 'B3' door not proven closed. TC recycled few times to no avail. Staff(TAP) assisted to push closed 'B3' door for train to    depart. ID: 3mins. (sent at 05:55 09-Jul-2024) CE : T204-3608 B3 door Proven open/Close. L3 TIMS showed 3608 Saloon Door B3 CLE occured 2 times. From ER, TC cycled doors 4 times before staff assisted to push close B3 door. Fault did not recur afterwards and train continued running on ML until scheduled withdrawal. FOD found: N, postulate FOD caused the door to be stuck, and subsequently dislodged when staff assisted to push close doors. Weather strip condition ok: Y Roller condition ok: Y Clean J-rail & guide rail: Y Door cyclic test 20x, DIR extinguish ok: Y TIMS door static timing test pass: Y Door lock switch red line flush: Y Door close switch actuating plate distance ok: Y Preventively swapped DCP from #3608 B3 door to #3608 A3 door. DCP s/n after swap: 3608 B3: 1410W020021S003 3608 A3: 1410W020021S024  Daniel 45483