Recently I was on an early UA 757 that has the old chemical flush commode. It struck me that when the aircraft went in for heavy maintenance there should be a real savings to replacing these with the more modern high pressure low flow commode.
The new technology should be lighter (less fluid), take up less space, and I suspect is simpler thus requiring less maintenance. Over time there should be a significant ROI to replacing the old commodes.
But of course with aviation there is always a catch and I am curious what that catch is.
- Is it technically feasible to replace them?
- If it is, is there a savings to doing so?
- If there is, is there a regulatory issue (certification)?
Has any carrier done it?