You've been around machines and mechanical systems enough to have picked up some basic understanding of how things work. Maybe you grew up in a family that worked with machinery, or you just spent enough time around repair shops and technical environments to absorb some knowledge.
You're not some master technician who can rebuild starship engines from memory, but you know enough about mechanics to understand basic repairs and maintenance. Whether through helping out with family projects or just being naturally curious about how things work, you've developed some familiarity with tools and mechanical systems.
Choose one of the following skill boons.
Upgrade your trusty utility belt to gain an additional +1 bonus for those times when you need a thingy-ma-bob, it's bound it be in your belt.
Your trusty multi-tool counts as a tool kit, for any three engineering skills, select which skills when you pick this legacy item, once sleeted these cannot be changed.
The Vaelori power coupling that nobody at Kovac Station could even identify, let alone repair, took you two hours and a wiring diagram you sketched from memory. The principles are universal: power flows, signals propagate, mechanical linkages transfer force. If it was built, it was built for a reason. Find the reason and you'll find the fix.
The atmospheric processor on Settlement Nine needed a part that hadn't been manufactured since the company that made it went bankrupt fourteen years ago. You fabricated a replacement from two incompatible components, a servo motor from a cargo loader, and a housing you machined from scrap hull plating. The replacement outperformed the original by twelve percent.
The turbine on Deck 4 sounded fine to everyone else. You heard the bearing. Not a noise, exactly; an absence. A harmonic that should have been there and wasn't. You pulled the housing, found the hairline fracture in the outer race, and replaced it forty hours before catastrophic failure. Machines talk. Most people don't speak the language.
The repair bay was out of replacement seals, the supply ship was three days away, and the airlock on Deck 9 was leaking atmosphere. You fashioned a gasket from packaging material, bonded it with adhesive that was technically rated for "decorative applications only," and pressurised the seal to spec. It held. It's still holding, actually. Your repairs aren't pretty. They're present.