Originally Posted by DozyWannabe
My suspicion is that the bump that hit at roughly the same time as A/P disconnect is the cause of that roll.
Originally Posted by rudderrudderrat
I don't think the roll was turbulence induced because the effect lasted too long and would be random L/R.
Turbulence is not always random and perhaps its effects should not be dismissed so easily. The 'bump' around 02:10 lasted about 10 seconds, as shown below.
P.S. The derivation of the formula for vertical gust velocity can be read
here .
