Snap: 3721 Train too noisy and abnormal. ~~~~~ Snap: 3721 Train too noisy and abnormal. CE : Car 3721 now is trailing car on south bound A1 door having air seepage sound intermittently. Moderate sound can be heard from the saloon  area.  3721 A1 door Checked and found door gap 65mm. Adjusted to door gap 63mm. Conducted door checks - satis.  Aliff/Redzwan 45326