Pax feedback to staff(PYL) train doors at car 3608 'B3' door were slow in closing. Staff(TAM) checke d and confirmed 'B3' doors at car 3608 were slow in closing.SM(TNM) assisted to isolate the train door in closed positi  ~~~~~ PERFORM DOOR CYCLIC AND WAS ABLE TO DUPLICATE FAULT INTERMITTENLY.FURTHER CHECK FOUND DOOR OPERATOR UNIT FAULTY.REPLACE DOOR OPERATOR UNIT OK.PERFORM DOOR CYCLIC TEST OK.PERFORM 20MM DOOR GAUGE TEST OK.PERFORM DOOR STATIC TIMING TEST OK.DOORS ABLE TO OPEN/CLOSE WITNOUT ANY PROBLEMS. SHAIK/HAZIQ/FAZLI 15.11.2023 S/N 1410W0200215039- OLD S/N 1411W0200215031- NEW NOTIFICATION 2542449