Hello Volen_ck;
I don't have acess to moi at the moment, but think about a profile extruded in the same direction the cylinder is. Draw a circle -> extrude! add a rectangle to the circle, trim to a closed curve sequence, join and extrude, Cut the result from the side view to the angle. Make the fillets Bool all together.
Or have a look here - for a different method for a similar problem:

http://moi3d.com/forum/index.php?webtag=MOI&msg=7626.1

Have a nice day
Karsten