Realtime feedback : Pax feedback train door at 3523 car A4 door closed very fast. Staff (BSH) checke d and confirmed train door closed very fast. ~~~~~ 3523 Realtime feedback: Pax feedback A4 train door closed very fast. Staff (BSH) confirmed train door closed very fast.  3523 A4 Door Speed Adjusted. Tested Operation - OK Koon PL 43846