Very common to find small or powdery stuff. Dont worry too much unless you can read the part numbers.

The number one trouble spot on the motor side is oil feeding the cam tower. The oil orifice is very small and will get plugged if the motor had sat for awhile. We have seen a bearing on the tranny side break apart and dump into the sump. But you will see the parts number on those pieces.

Confucious say: Man who lay woman on ground gets piece on earth.