I have created a collection of Cool aviation stuff, books and simulator gadgets for you 👉🏻 https://www.amazon.com/shop/mentourpilot Have you ever noticed that there is a long thin tube protruding out of the back of the Boeing 737 jet engines? Sometimes there is smoke coing out of the tube, after the aircraft has shut down the engines. Do YOU know what that tube actually does? I will dare to guess that you THINK that you know what it is but I also think that this video will surprise you! In todays video we will dive deep into the oil system of the CFM56 and I will tell you about a feature of the system that not even I knew existed in this way before I started to research. As always I would love to have your feedback about what you thought of the video as well as more questions on systems or other things you would like me to discuss. Please leave a LIKE and a comment to the video and who knows, maybe it will be YOUR question I base my next video on. Now! Come in to the Mentour Aviation app and discuss what You think about this! Download the app for FREE using the link below 👇 📲 If you want to support the work I do on the channel, join my Patreon crew and get awesome perks and help me move the channel forward! 👇 👉🏻 https://www.patreon.com/mentourpilot Follow my life on instagram and get awesome pictures from the cockpit! 📲 https://www.instagram.com/mentour_pilot Links partially used as sources for todays episode: https://aviation.stackexchange.com/questions/20943/what-is-this-on-the-aft-end-of-this-genx-engine https://www.airliners.net/forum/viewtopic.php?t=763893 https://www.fzt.haw-hamburg.de/pers/Scholz/Aero/AERO_M_JetEngineBearingsAndOilConsumption_18-04-02.pdf