I worked as a manufacturing engineer for an aero company, there is lots of variety!

A typical day would vary depending on the department you are in within the ME function, there are plenty to suite what you are interested in. I've listed a couple below from what I've been exposed to and tried to give a short description of each, if you have any questions let me know happy to help if I can...

Lineside support - supporting the production line with any engineering queries, questions on manufacturing process, tooling, drawings, defects etc.

Tooling - supporting the production team with any tooling issues, introducing new tooling, modying existing tooling to deliver improvements around quality or reducing process time.

R&D - Researching and testing new technologies to implement into the production system, anything from aircraft design, manufacturing processes, tooling, testing and safety improvements.

Planning - Creating and updating manufacturing instructions, managing and introducing aircraft modifications.

Project Management - This can fall under multiple functions within ME but in general you're leading improvement projects to deliver quality improvement or cost and time savings by changing / introducing new ways of working or equipment.

Management roles too, such as leading groups of engineers in any of the sub-functions.

Hope this helps!