I am not sure why you are so worried about the gross weight. You have
documentation for the new empty weight and CG, right? So whatever you decide
to put in the airplane, animal, vegetable or mineral, you can weigh and/or
calculate to do your W&B for a particular filght. As long as you are inside
the CG envelope and not over takeoff weight (and can show your work) you
should have no hassles. Right?

"Andrew Gideon" wrote in message
gonline.com...
Newps wrote:

You're talking empty weight. Gross weight is the max the airplane can
weigh.

No, I'm not. That's part of the problem. It is completely reasonable to
expect, with work that involves neither airframe nor powerplant, that the
gross weight won't change (even though empty weight has). But is it
*legal* to operate under that assumption, or must a new W&B list the "new"
gross weight even if it is not changed?

It appears, from some of the other postings, that a new W&B need not
describe the gross weight if it's not altered. I (and some others) have
merely been "spoiled" by always seeing the gross weight on any W&B.

- Andrew