Aviation Wikiproject quality rating 

Start: An article that is developing, but which is quite incomplete and, most notably, lacks adequate reliable sources. Really? Until recently it was a Good Article, and the reviewer that eventually delisted it said "this article covers the topic well." Except for a few more references, it meets the all the B class criteria:
The article is suitably referenced, with inline citations where necessary.
The article reasonably covers the topic, and does not contain obvious omissions or inaccuracies.
The article has a defined structure.
The prose contains no major grammatical errors and flows sensibly, but it certainly need not be "brilliant".
The article contains supporting materials where appropriate.
The article presents its content in an appropriately accessible way.
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