Originally Posted by
FlexibleResponse
The concept of "good" FOD as opposed to the classically defined and accepted "bad" FOD is new to me, and begs the question of what is "good" FOD and how is it objectively defined?
Who, other than you, said anything about "good" FOD?
But not all FOD is equally BAD, some is much worse and far more serious.
The whole reason you have fuel filters is because the fuel may contain non fuel particles, be it bits of rust, water, or biologic matter.
My suspicion is the is something that the filters would catch (and have on the AC while in service) leading to a clogged filter but reduced pressure would signal it before it was dangerous vs something like a rag that could suddenly block the fuel pickup.
But again, we don't know because no reporting has covered what was found (material, size, etc)