The first planet available to explore in Star Wars Jedi Fallen Order is Bogano. You will reach this planet after completing the prologue. While exploring this planet, you will come across the location called Broken Wing, where there is an electrified water puzzle that has to be solved.
If you don't solve this puzzle, you won't be able to return to the Crash Site.
The entrance to the Broken Wing can be found in the location with a boss - Rabid Jatoz.
After the battle, you can enter the tunnel. At the end of it you will find a loose element that can be destroyed. It'll allow you to get through.
When you jump into a hole, you will get to a new location. At the beginning you will be attacked by some opponents. Use Force Push to quickly get rid of them. Just throw exploding plants at your enemies.
First, let BD-1 to unlock another door. Move through the door to get to the next part of this location.
When you reach the water reservoir, you have to jump on the metal object located at the ceiling and move to the other side.
When you reach the next room with a water tank, immediately swim to the other side and cut the cables with your lightsaber. Then return to BD-1 and let him open another door.
To leave this location, simply enter the elevator and it will take you to the next level.