TC reported train doors at car 1606 'A4'door did not opened. Staff(YWT) checked and confirmed train door at car 1606 'A4' door did not opened. Staff(YWT) isola ted the train doors in closed position. ~~~~~ 1606 TC reported A4 train doors did not opened. Staff(YWT) confirmed A4 train door door did not opened. Staff(YWT) isolated the train doors in closed position.  1606 Check fault code: FC82 (A4 door open timeout) FOD found: N Weather strip condition ok: Y Checked roller condition ok: N,1606 A4 RHS outer roller                                       delaminated Clean J-rail & guide rail: Y Push/pull door smooth & no wobble: Y, after rectification Door cyclic test 20x, DIR extinguish ok: Y, after rectification TIMS door static timing test pass: Y, after rectification Door lock switch red line flush with surface for positive latching: Y Door close switch actuating plate distance ok: Y Door gap (criteria 63mm+1.5mm): 63.7mm Replaced 1606 A4 RHS outer roller.  Sarma/Sugu/Anand/Shafie 45233