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How to ID a MAX. https://www.linkedin.com/pulse/how-identify-boeing-737-max-louis-duc-nguyen https://www.linkedin.com/pulse/how-identify-boeing-737-max-l...

• tyingq 6y ago
  Odd that it doesn't mention the sawtooth pattern on the rear of the engine cowling, or the flat bottom shape of the engine as you look into the intake, versus the normal round shape for non-max/leap engines. Either of those is easy to spot from far away.
  • AnimalMuppet 6y ago
    I don't think that's right. Didn't several generations of 737 before MAX have that flattened engine bottom? I think I've been seeing it for considerably longer than MAX has been around.
    • tyingq 6y ago
      Ah, yes, searching a bit, you appear to be right about the flat bottom. I believe the sawtooth edge is still correct though.
      • rawgabbit 6y ago
        The sawtooth is called a "chevron" and is designed to reduce engine noise to meet FAA standards.
  • jerbs 6y ago
    The CFM 56 on the 737 (NG or Classic) also has a flat bottom. E.g., [1] shows a 737-800 with an engine with a flat bottom, and [2] shows a 737-300 with an engine with a flat bottom. [1] https://commons.wikimedia.org/wiki/File:CFM_56_Lauda_737.jpg https://commons.wikimedia.org/wiki/File:CFM_56_Lauda_737.jpg [2] https://commons.wikimedia.org/wiki/File:Classic_Colors_Southwest_Airlines_N648SW_Boeing_737-3H4_SJC.jpg https://commons.wikimedia.org/wiki/File:Classic_Colors_South...