Boeing is hoping its 737 Max jetliner will win approval to return to the skies by the end of the year, after it was grounded following two crashes. PK-REN/WIKIMEDIA COMMONS The Lion Air 737 MAX plane which crashed. One big problem: At present, few 737 Max simulators exist, which could significantly slow down the retraining process. What's the Boeing 737 Max? The 737 Max uses new engines that allow it to fly farther and use less fuel.

Source: Stuff November 13, 2019 19:05 UTC