A fossil typically represents preserved biological material or traces of organisms embedded within geological material. Fossils can absolutely have intricate patterns, but identifying one requires more than simply noticing that a specimen looks strange.

A true fossil identification often depends on:

Rock type

Geological context

Structure

Mineral composition

Location

Age of the surrounding formation

None of that information is available from this image.

So calling the object a fossil would be premature.

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Could It Be an Aircraft Component?

Probably not based on the appearance shown.

Aircraft components are manufactured to precise standards and usually have recognizable mechanical or structural characteristics.

The object in the photograph appears irregular, organic, and highly repetitive in a way that does not resemble a conventional engineered aircraft part.

It also appears to have a granular, earthy surface rather than a machined or molded one.

That does not prove it has nothing to do with aviation equipment.