Pax feedback to staff(SBW) unusual soundheard from undercarriage. Staff(YCK) checked and confirmed unusual sound coming from undercarriage in car 3541. ~~~~~ 220 3541 Pax feedback to staff(SBW) unusual sound heard from    undercarriage. Staff(YCK) checked and confirmed unusual sound coming from undercarriage in car 3541.. CE:3541 soft knock noise from undercarriage  3541 check axle bump stop ok and check underframe no abnormalities. Check wheel condition found 3541 A2, A4, B4 having SP. Check dump valve test ok. Brake on/off ok, physical check ok. Notif to wheel profile:2617414 Done by Saini/Din/Lingkes 45487