*Damage

The use of Debris is a recent corruption of the term, apparently in an attempt to nounify the acronym.

It's also tautologous; if it's a foreign object then implicitly it's debris.

I learned the definition as 'Foreign Objects and Debris' when I was trained in the USAF in 2001, but I recently read an FAA document that used a different definition. I'm not sure there is agreement on what this acronym actually stands for.

In the context of TFA, debris seems more appropriate? Anyway I was just sharing something I quickly looked up, and this was the first meaning that made sense.