During one of my recent clearouts I found a couple of parts that I am stumped by.
First one will probably be easier as it is mostly intact. (click on images for larger pic)

There are numbers and stamps on the flaps - number is 5073587

And on the hinge its 2073477

The inspection stamp I thought may have been Douglas but I am not an expert on these things
The other part in the same lot - what on earth is that ? Also has similar part numbers and stamps as shown in the photo so I think from the same aircraft.


Bear in mind this is Australia and from an ex RAAF person's estate. Any help would be greatly appreciated !