:)hi,just a basic question.Presently on our A319s we use the weight entry octupus charts.I want to know for a weight like 59 t,do we interpolate between the boxes for 58t and 60 t even if they have different limit codes for eg 2/7 and 3/7.Intially in our ground school we were taught that we could only interpolate between the weight boxes which had similar limit codes.In case of different codes we were asked to simply move on to the higher weight boxes and to extract the speeds and flex.However in the last two years we have been advised that interpolation between weights with diff codes is allowed although no reasons were given for this change in the procedure.Thanks

Generic answer as I don't have the specific data.

The short answer should be "no".

The problem is that the two limits will have different curves and, unless you plot both lines, you have no idea where the lines are going.

Interpolating between two points, one on each line, is somewhat meaningless as there is no line between the two points ?