Haha it's common to misunderstand what the 3rd law is saying. I hope this helps.

The simplest and the most accurate way of stating the 3rd law is "If body A exerts a force on body B, body B will exert the same magtitude of force on body A" Sounds easy but not easily understood when its used to solve problems.

Take the helicopter as an example. The earth pulls the helicopter towards it and by virtue of the 3rd law, the helicopter MUST pull the earth towards it. Because we are dealing with gravity, the universal law of gravitation applies here and these two forces are N3L pair forces. Sounds easy right? However this is where many people get confused, I quote,
Can you see where you got lost? There is a engine thrust that acts upwards and there is a helicopter's weight pulling downwards and you made them equal. This is wrong because N3L doesn't come into the picture. Think about it, the helicopter's weight is due to the gravitational force exerted by the earth on the helicopter, so which is its corresponding pair force? Shouldn't it be the gravitational force of the helicopter exerted on the earth(helicopter pulls earth)? The thrust is not the corresponding N3L pair force. It's just another force acting on the helicopter in addition to the gravitational force. A N3L pair force must be the same species, I pull earth, earth pulls me, same species of force.

Now then what is the corresponding pair force for the thrust? The engine pushes the air downwards, so what pushes the engine(helicopter)?

The way to solve such problems is to draw free body force diagrams, it's essentially a diagram that shows you what are the forces acting on the body. N3L does not apply here. Why? Just read the 3rd law again. To give you a hint, if I exert a force on a body, I don't feel, I don't experience the force exerted by me. I don't feel my own push when I push someone.

Does it help?