c/avionics-technicians

My old foreman told me to always check the cannon plug first on a nav system fault

I spent two hours tracing wires on a Citation's GPS dropout issue last month. He said, 'Nine times out of ten, it's just a pin backed out in the connector.' I finally listened, pulled the D-sub at the MFD, and sure enough, pin 14 was barely hanging on. Crimped it back, system came right up. Anyone got a better method for checking those things without pulling the whole rack?

A talk with a retired guy at the hangar made me rethink my whole approach to wire diagrams

He said 'If you can't trace it with your eyes closed, you didn't draw it right,' and that stuck with me. How do you all organize your schematics to make troubleshooting faster?

Had to choose between a new multimeter or a better crimp tool for the shop budget. Went with the crimper.

The boss gave me a $400 allowance to get one new piece of kit for our bench. It was a tough call between a fancy new digital multimeter with more functions or a high-quality, ratcheting crimp tool set for D-sub pins. The old crimper we had was just a cheap hand tool, and I was tired of fighting with it on harness repairs. I figured a solid connection is the foundation of everything we do, so I ordered the crimp set from a brand called Erem. It showed up last Tuesday. Used it on a G1000 audio panel harness job, and wow, what a difference. The crimps are perfect every single time, no more cold joints to chase. Has anyone else made a similar choice? What's the one tool you'd pick if you could only get one?

The great wire snake of 2022 at our hangar in Phoenix

So about two years back, we had this old Cessna 172 come in for a full panel upgrade... the avionics bay looked like a bowl of spaghetti someone dropped. I'm talking about a solid week of just tracing wires, no joke. The before picture was pure chaos, just a mess of old, faded wires all tangled together. The after picture, taken after we finished the job, looked like a wiring diagram from the book. What changed was our lead tech, Dave, who had this crazy idea to use a label maker and color-coded zip ties for every single system. He said, "If we can't fix it fast later, we didn't do it right now." It took us an extra day to do it his way, but the next time that bird came in for a check, a problem that would've taken hours was sorted in like twenty minutes. Anyone else have a boss or coworker who pushed for a super clean setup that paid off big time down the line?

A lot of the new guys treat a DMM like it's a magic wand.

I watched a trainee spend twenty minutes trying to find a phantom voltage drop, but he had the leads in the wrong jacks for the test he was doing. It's a basic tool, but you still have to know how to actually use it. Anyone else see this kind of thing happen often?

My kid's plane fear has me rethinking how I talk about work at home

My son got scared after hearing about a minor aviation incident. I explained all the safety checks we do, but my wife says I'm just stressing him out more. Where do you all stand on sharing job details with family?

My old mentor could smell a bad capacitor. Now we just swap boards.

Avionics was hands on with visible wires and components. Faults had physical signs like heat or smell. Now it's all digital systems and software. Diagnostic tools give data but not insight. Where's the troubleshooting skill? I miss the tangible fixes. Are we losing the technician's craft? It confuses me how reliant we've become.

Pro tip: Pack for humidity on tropical assignments, but my partner thinks heat is the real enemy.

Moisture kills circuits, yet I've seen more failures from thermal stress in deserts.

Just had a pilot ask if the black box was actually black

It's funny how often I get basic questions from flight crew about avionics gear. Made for an awkward pause while I tried not to laugh.

Greasy hands and circuit boards do not mix at my station

I watch coworkers munch on burgers while handling avionics units and it's a sure way to get dirt in the systems. Oil from food can ruin touch screens and attract dust that blocks airflow. Keep your snacks for the lunch table away from the bench to avoid costly clean-up jobs. It just takes one spill to fry a board and set back a whole project.

TIL that eyeballing wire bundles can catch issues software misses

Most techs trust the diagnostic suite first. I've found visual checks often spot corrosion or chafing before it flags on screen.

Warning: Arguing with my lead over skipping steps in the avionics check almost got a plane grounded, lol.