Placing engines on the wing provides beneficial wing bending relief in flight. ... The pods are in front of the wing to help avoid flutter of the wing which, in turn, allows a much lighter wing structure.

Why are engines below the wing?

Wings want to bend upwards as lift increases, and to counteract this wing bending relief, fuel tanks are in the wings and engines are mounted under the wings. Due to this wing bending relief, much larger and heavier engines can therefore also be used.

How are engines attached to wings?

Engines are attached to a pylon

The pylon is fixed into the wing structure, with a solid and very secure fitting. The pylon creates some distance between the engine and the wing. This is vital in the event of an engine fire to protect the wing (and fuel stored in it) until the engine fire is extinguished.