Snap : 3721 Noise heard when train at top speed. ~~~~~ Snap : 3721 Noise heard when train at top speed. CE : 3721 A1 Door Noisy because Of Air Seepage Sound.  3721 A1 door gap checked/found gap at 65mm. Adjusted door gap to 63mm. Checked weather strips ok. Door cyclic test ok, DIR able to extinguish.  Aliff/Daniel 45446