The picture posted of retangular red-white object:
https://s3.amazonaws.com/org.barkah..../Misc/door.jpg
it's not a door. It's looks rather like a wingtip (red with a narrow white strip). The only thing painted in such pattern on that plane.
http://www.aero-news.net/images/cont...ring-1212a.JPG
But I'm not sure the aircraft in question had this type of wingtips ?