Originally Posted by
Kaphias
Yeah, please don't do that. It's best to just link to the page, frowned upon to copy and post just the photo, but way uncool to remove the copyright banner.
N303AS was the second prototype 739; N302AS was the former N737X, the prototype 739. That one also went in for paint earlier this week. Neither is able to get the winglet upgrade for reasons I don't understand, but am hoping someone here could fill us in...
I don't know the specifics, but there's something different about the wingtip structure of the 739 flight test articles that makes attaching the standard 737 NG winglets unfeasible.