Thank you Rudder
There is a remote chance that both center tank pumps will fail so your scenario is not considered.
I agree its remote. But I had to make up this scenario to get to my real question.
Unless there is a QRH procedure for your scenario,
there isnt, as far as busting the ZFW limit is concerned
I guess you would be permitted to continue the flight up to a point of landing with enough wing tank fuel available to be legal.
Thats what I really want to know. Is there a way to calculate that?
The fact that you have exceeded the maximum zero fuel weight would result in a landing inspection - so it may be cheaper to divert early.
Whats the chance of damaging the structure after busting the ZFW limit?
Thank you all for your input.