Hi i was just wondering if this was normal. Whilst flying at about 35,000 the white needle swings from left to right only slightly my heading was 128 with the wind coming from 301/29 knots.Kind Regards Chris Harwood

you mean the white curved line that appears mainly when you turn? Occasionaly, if the computer load is high, yaw damper will lag behind the aircraft movements, and will oscilate the aircraft around vertical axis. This is not normal per se, but has no real adverse effect, if momentary (usually happens to me when browsing the net on the other monitor). In any case, you can get rid of it by turning the YD off until the computer load is stable.