[jim_trent]

Although this article only touches on it, I remember reading that practically EVERY tile on the shuttles is unique. A different thickness, different shape (top and/or bottom), or different material. That is why they could not just bring a few extras along, with some superglue to stick them on. There are some other websites and even on TV, people voicing that opinion.

I have no doubt that they must have had a backup plan if some of the tiles were damaged in space. However, I have not heard anyone talk of it. It would have to be more complicated that sticking a few on, but there must have been something.

[NormsRevenge]

You are correct about the uniqueness of almost all the tiles used on the shuttles. There are very few options, if any, that would have offered any chance of surviving re-entry with a patch of some sort applied.

[John Jamieson]

Every tile is different and has serial number. Going to be a big factor in determining what happened first.

It was once considered but determined to be impractical to replace/repair tiles on obit.

[supercat]

I have no doubt that they must have had a backup plan if some of the tiles were damaged in space. However, I have not heard anyone talk of it. It would have to be more complicated that sticking a few on, but there must have been something.

Would it be possible to coordinate launch schedules with the Russians so that they would have a Soyuz 24 hours or less from launchability when we do a shuttle mission, with the ability to retarget to the Shuttle's orbit should the need arise (with us possibly providing some reciprocal services)?

To be sure, the Soyuz would probably only be able to remove two of the astronauts, but it could also supply life-support supplies as well as such repair supplies as were determined to be necessary.