Our back hatch can be difficult to open at times, after reading Foiled Again and MeFly's post went out to evaluate our hatch.
Won't you know it, I had no problem opening it today. On some days I would have to struggle with the handle. My observations of the locking pins:
When in the closed and locked position the locking pins in our EB are approximately 1 1/2 inches extended beyond the hatch
when turning the handle to open position, the locking pins are about 1/2 inch out but no longer engaging the holes on the sides of the trailer, thus facilitating the hatch opening.
i imagine that the lease bit of miss alignment would cause the hatch to either jam or not be secured at all.