wrote:
OK... I've got a question. I've seen a number of aircraft around that have
had little patches and repairs made on them. Sometimes on a wing or fuselage,
sometimes on an elevator, sometimes on an aileron. I've heard that it is illegal to
patch moveable control surfaces, but yet I've seen numerous aircraft around with
repairs like that.

Flight controls are balanced to prevent flutter (something that can
kill you pretty fast). Any changes to the control surface require the
surface to be removed and balance checked unless the manufactor has
another method of compliance.

-Robert