Andsy and his friend will go through the central hallway, use mask to get rid of them.

Withered Andsy will go through sides of hallways, flash on him to get him away. Sometimes after that he goes to the other side, if so the scenario is do same but opposite direction.

Shadow Andsy will randomly appear when you open the monitor. Close the monitor so he wouldn't reach you.

Don't forget to recharge generator in CAM 1B.

And don't use flashlight too often.