A very good thriller that is set in the world of people who design, operate and regulate commercial aircraft, with a couple of nice twists. If a plane with over 300 people crashes it is unlikely a lone young fellow gets to identify the cause all by himself, and there are a few other technical 'stretches' but overall the movie is a very pleasant surprise. I believe some essential abbreviations were left unexplained: cvr stands for cockpit voice (and other sounds!) recorder, fdr stands for flight data recorder (things measured by the equipment such as airspeed, altitude, how the controls such as flaps are set and much more), and AP stands for autopilot. The movie accurately reports modern aviation issues, particularly the tension between automation and what is left to do for pilots. A 'feature' is decribed that corrects a plane's behavior as it goes into a 'decrochage' (I watched the original version), or a stall, essentially a situation where an airplane flies too slowly, loses lift and drops to Earth. This clearly referred to a recent, notorious piece of software from Boeing that sent two crowded 737 Max airplanes into the ground. We also get to see how new planes are approved, which includes a test with volunteers demonstrating everyone can get out on time when the aircraft sits on the tarmac (I guess the images shown were those of the mighty A380). What the movie also depicts well is the revolving door problem between airplane builders and the regulatory authorities (you have a similar problem in the drug industry and the FDA). In spite of the movie's title, you'll forever know that fdrs and cvrs are not, actually, black.