This article is from the Final-Fantasy and other Square Soft Games FAQ, by firstname.lastname@example.org (Nick Zitzmann) with numerous contributions by others.
Once you defeat Byak-Ko on floor 10, the game assumes that you don't
need the glider anymore after you have the sphere and take off for the
If you do revisit floor 10 for any reason, you can get the glider back
by talking to some of the people inside the Pub in the first town.