Probably your best chance of identification is to identify the location of the find better. There are many on this forum who have records of what crashed where and they will know what crashed at that location or in the sea nearby.
As to what it is - my instant first reaction was a landing gear linkage such as the one in the middle of a drag brace. That does NOT exclude any other possibilities.
My feeling is the checker is from a foot pad on a landing gear brace that the crew stood on when doing preflight and ground staff used during maintenance but I have been wrong many times before
My feeling is the checker is from a foot pad on a landing gear brace that the crew stood on when doing preflight and ground staff used during maintenance but I have been wrong many times before