Originally Posted by
Aquapilot
True ....FMS will recalculate the fuel with the lower ALT.........Don't forget that use of flaps en-route is prohibited.......However, I am not aware of any restrictions on the Gear other than Speed........I had a friend that got to the destination and had to fly around in a hold fully configured with the trust levers pushed up to burn off excess fuel......was ridiculous....but it worked.

If you're below 15,000, you are probably close enough to consider yourself out of the enroute phase.