Apparently there is a recurring issue at Air Canada with porn being left in the flight decks of its Embraer fleet. 

CBC News has obtained an internal Air Canada bulletin warning flight crews they could be fired or face criminal charges for placing “inappropriate material” in the flight deck.
It was sent last year, four months after a similar reminder to stop hiding “suggestive images in Company aircraft” appears to have been ignored.

Two things are weird about this; firstly, that it keeps happening despite threats of criminal prosecution. Secondly, that it's exclusive to the airline's Embraer fleet. That fact is even highlighted in the company-wide email sent out by Air Canada's Chief Pilot, a copy of which can be seen below.