Snaprep: 3620 unusual noise when A2 trai ~~~~~ Snaprep: 3620 unusual noise when A2 train doors open and closed. CE : 3620 A2 door open with rattling noise. Depot to check 3620 train doors A2 side operation.  3620 A2 door no FC recorded. checked/found RHS roller delaminated, LHS door roller - OK. Check history DCP swapped before & date: N Check fault code: No FC FOD found: N Weather strip condition ok: Y Removed door checked roller condition ok: N, 3620 A2 RHS outer roller delaminated. Clean J-rail & guide rail: Y Push/pull door smooth & no wobble: Y, after roller c/o Door cyclic test 20x, DIR extinguish ok: Y, after roller c/o TIMS door static timing test pass: Y, after roller c/o 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 3620 A2 door RHS delaminated outer roller.  Sarma/Alan 45147