- When it will be ready, it will get out.
Why is it not
- When it is ready, it will get out
Future with clause time is rarely used: so why is it used in this clause,"when it will be ready"? I think the first sentence means that I will tell you now when the merchandise will be ready (may be a fixed date) but it is not ready now. The second means that I will let you know as soon as the merchandise is ready.
It is the same problem for these sentences
- It will take up to 72 hours until it will be ready. or
- It will be 72 hours until it is ready
I think the first one is only possible in this case.