This is the bottom of the fuselage of a DA40NG aircraft and where the right wing attaches to the fuselage. What is the thing I'm pointing at with the red arrow in the picture?
As it is written in the photo, we see the fuel cooler inlet and outlet sections. But towards the right, where the wing is very close to joining the fuselage, there is a hole and a metal protrusion coming out of it.
Does anyone know what it is and what it does? At least from which source can I learn this information? Because I could not find this information in AFM and Airplane Maintenance Manual.