Are you sure about that? One of the few occasions I need to adjust the AGW page (rather than just pressing UTIL - NAV) is when at higher levels, when 140 KIAS exceeds the MAUM Vne. In the absence of a Vne chart, it's not easy to predict.
Yep, you are quite right - my oversight, over enthusiastic reply without checking the figures! Need to drop a few pounds and pull 86%, or adjust the AGW page!