In the 121 world, today? Yes. Anything you ask Mx to do requires a writeup. Technically.

They've gotten pretty serious about it. Too many operators kept glossing over intermittent faults, and you'd have the same thing recurring again and again without any formal documentation that the FAA could follow.

It actually protects pilots. And Mx jobs... at my last airline it was actually Mx management that was driving it, because line Mx spent so much time addressing minor undocumented issues that they couldn't keep up... and couldn't justify more staffing to HQ because there was no paper trail.