Go to 4.28
or the Annex provided. Enter top right with 50,000kg, move left to 2000ft PA in
the 'anti-skid inoperative' grid, drop vertically down.
The graph shows that, if you were coming through it from bottom to top, you
would go to the flap setting reference line then to the chosen flap setting.
Because we are coming through the other way we have to reverse the process and
go to the flap setting first, then the reference line. Following this idea, a
flap setting of 15º would have the effect of moving the lines to the right,
increasing the distance required. This, and our basic theory, tell us that
flaps 40º is the optimum setting. Drop the line to flaps 40º then go back, up
and left, to the reference line, drop vertically down.
Go straight through the runway condition grid, the runway is dry.
When you get to wind, the most adverse condition would be 15T. Go straight down
to 15T, then up and right to the reference line, then straight down to read
somewhere between 3000m and 3100m