1. Filters (water)
2. Filters (air)
3. Coolant
4. Every. Single. Gasket. Has. To. Be. Checked. No seriously. If you're traipsing around a remotely grounded setting on a remotely regular tour the raw PARANOIA surrounding every single fitting in the entire ship would make a semiconductor clean room/operating theater environmental services person feel like you're being a little overboard. We can check gaskets with both ultrasound and various types of radiation nowadays but some stuff is gonna have to be disassembled.
5. If at all possible you'll want to flood the entire ship with ethylene gas to ensure nothing unsavory got stuck in any of the systems. The ISS apparently has A Smell so that's a good opportunity to change out the local gas mixture.
6. Sir Newton tells us that every magnetically or gravitationally active part is acted upon by an equal force. Meaning whatever you use to contain your fusion reactions and establish a Warp bubble is constantly getting pushed on. Re-aligning circuitry that's been loosened by the operations of your drives is gonna be important.

Warp bubble degradation could honestly work as a rather decent cap on millage. Yes more sauce = more fast and yes square cube law actually works in your favor in space but also your entire assembly is going to deteriorate the longer you abuse it so there's a point where you need to go to dry dock and get it all readjusted lest efficiencies drop down to such an extent you might not make it back at FTL.