They build planes tailored to customers' requirements. A Russian airline obviously didn't order that option
What makes you think that (a) any airline would not order that facility on that model (if it is actually an option on that model and not standard equipment) and (b) it is "obvious" that Aeroflot didn't order it?
As well they should be. By using the term "ratted out" you make it appear that you disapprove of their being caught that way and that ratting out drug smugglers/users is a bad thing.
One of the ones that they bought. Probably has all the brakes it needs and all the required maintenance...the crew have a vested interest in being alive after the flight.