This is from a news article :
Airbus likes to unveil major jet orders at the air show held every other year in its home country. Airbus is one of France’s — and Europe’s — biggest companies, and its performance at the Paris air show is seen as important to its public image in France.
It seems that 'as' is a preposition, but I wonder whether it can take an adjective ('important' here) as its object, rather than a noun.