I was wondering what the 'things' under the wing were, and what they do, they only seem to be on Airbus aircraft.
Underneath are the motors that drive the flaps, linkages etc. Covers are simply shaped to assist with aerodynamics .
They are called pylons...but they are are also on the 737
Pylons are usually what thre engines are attached to, found on the leading edge rather than the trailing edge. As suggested the items in the picture are found on almost every modern airliner jet or TP ie not just the "bus".
Thanks for your replies, I wasn't aware they looked like that on other aircraft 🙄 Thanks again