# Problems when starts lessons **URL:** \ **Category:** Academy Technical Support\ **Created:** [November 27, 2025, 3:34pm UTC](https://forum.navigraph.com/t/problems-when-starts-lessons/21552 "2025-11-27T15:34:55Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Antilope](https://avatars.discourse-cdn.com/v4/letter/a/c4cdca/32.png) [@Antilope](https://forum.navigraph.com/u/Antilope)\ **Post date:** [November 27, 2025, 3:34pm UTC](https://forum.navigraph.com/t/problems-when-starts-lessons/21552/1 "2025-11-27T15:34:55Z")
Hello everyone. I’m here looking for help with a problem that’s been bothering me since I installed Navigraph Academy. When I start the lesson, upon launching on the track, everything starts vibrating and bouncing. I also get a message about landing gear and tire problems. I can’t stop it. If I start missions while still in the air, it automatically falls down. Could someone find a solution? Thanks. ---
**Author:** ![GordonNG](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/gordonng/32/27797_2.png) [@GordonNG](https://forum.navigraph.com/u/GordonNG)\ **Post date:** [November 27, 2025, 4:05pm UTC](https://forum.navigraph.com/t/problems-when-starts-lessons/21552/2 "2025-11-27T16:05:51Z")
Hello, When you say “If I start missions while still in the air, it automatically falls down” Does the aircraft just begin descending? Is there power applied? ---
**Author:** ![Antilope](https://avatars.discourse-cdn.com/v4/letter/a/c4cdca/32.png) [@Antilope](https://forum.navigraph.com/u/Antilope)\ **Post date:** [November 27, 2025, 8:33pm UTC](https://forum.navigraph.com/t/problems-when-starts-lessons/21552/3 "2025-11-27T20:33:38Z")
The engine is on. But the plane go down ever ---
**Author:** ![Antilope](https://avatars.discourse-cdn.com/v4/letter/a/c4cdca/32.png) [@Antilope](https://forum.navigraph.com/u/Antilope)\ **Post date:** [November 27, 2025, 8:58pm UTC](https://forum.navigraph.com/t/problems-when-starts-lessons/21552/4 "2025-11-27T20:58:13Z")