c/avionics-technicians

Found a fix for a stubborn Garmin G1000 AHRS drift issue on a Cessna 172

The plane kept showing a 5-degree bank error that would come and go. After checking all the normal stuff, I tried re-seating the main avionics rack connector with a specific 35 inch-pound torque on the center bolt, not just hand tight. That cleared the fault and it's been solid for 3 months now. Has anyone else found that connector seating torque makes a real difference on these units?

Heard a pilot on the ramp call our job 'magic'

Was doing a walk around on a Citation in Dallas last month. Pilot walks by, points at the panel, and says 'You guys are basically wizards. I just push buttons.' Kind of funny, but it stuck with me. He sees a working system. We see a hundred wires, three LRUs, and a fault history that took two days to trace. Makes you think about the gap between what we do and what they see. Anyone else get comments that just totally miss the point of the job?

Burned a whole Saturday on a bad coax crimper from Harbor Freight

I was redoing some antenna runs on a Cessna 172 and grabbed a cheap coax crimper from Harbor Freight to save a few bucks. The thing couldn't hold a consistent crimp to save its life, and I wasted about 4 hours redoing connections before I gave up. Ended up costing me a $300 Saturday side job. What's your go-to crimper brand that actually works right the first time?

Staring at a stubborn LRU connector, I had to pick my poison

It was on a Garmin G500 install, and the main data cable had a bent pin. I could either try to straighten it with my fine tweezers, or cut the whole connector off and re-pin it. I went with the re-pin, which took about 40 minutes with the crimp tool and a new backshell. It worked perfectly, but I'm curious if anyone has a better trick for fixing a single bent pin without taking the whole thing apart.

Just finished my 100th autopilot calibration this year

I always thought it was just a routine box-check, but hitting that number made me see the pattern in the tiny adjustments. It's not just about the numbers on the screen, it's about feeling the aircraft's response in the air. Anyone else notice a specific calibration count where the process just 'clicked' for you?

I finally stopped using the old school continuity test for every wire fault

For years, if a system had a bad connection, I'd just buzz out the whole harness with a multimeter. Last month on a Citation X, I spent 6 hours chasing a phantom ground on a nav radio that kept dropping. A guy from our Dallas base walked over, hooked up his Fluke 87V in millivolt drop mode, and found a 0.4 volt drop across a single pin in the D-sub in about 30 seconds. The crimp was slightly loose. Now I check voltage drop first on any intermittent issue. Has anyone else switched their main troubleshooting step for chasing bad connections?

Changed my mind about using canned air on old connectors

My lead tech, Frank, told me to never use canned air on old cannon plugs, especially on the C-130s we work on. He said the quick blast can push old grease and grime deeper into the pins. I thought he was just being overly careful, so I did it anyway on a UHF radio plug last week. Sure enough, after I blasted it and reinstalled, we got intermittent comms. Had to pull the whole connector, clean each pin with a proper solvent and brush, which took about two hours. Frank just shook his head. What's your go-to method for cleaning those old, greasy multi-pin connectors without making a bigger mess?

I spent $150 on a cheap multimeter that cost me a whole day of work

I was working on a G1000 autopilot issue and needed to check some sensor voltages. Grabbed this new budget meter I got online. The readings were all over the place, so I kept pulling panels and tracing wires for like 8 hours. Turns out the meter itself was junk and giving false data. Has anyone found a solid, mid-priced meter they actually trust?

A pilot told me my comms checks were too quiet and it fixed a problem I didn't know I had.

He said, 'I can barely hear you on the ramp, you sound like you're in a closet,' after a pre-flight in Phoenix. I started using a headset with a better mic and speaking up, and now my squawks on radio clarity are way down. What's one small piece of feedback that actually improved your work?

Update on that intermittent autopilot fault on the King Air C90s

After chasing a random pitch trim runaway for a week, I finally found the issue was a corroded pin in the D-sub connector at station 43, which I fixed by cleaning it with a fiberglass pen and applying a dab of Stabilant 22A.

A near miss with a static strap in Anchorage made me double check my grounding routine

Ran into a retired tech at the air show who said something that stuck with me

I was at the Sun 'n Fun show in Lakeland last week and got talking to a guy who worked on F-4 Phantoms back in the 70s. He was looking at a modern glass cockpit display and said, 'We used to fix things with a meter, a manual, and a soldering iron. Now you kids just plug in a computer and hope it tells you.' It hit different because I realized I do exactly that, and I've never really had to trace a fault through a whole analog circuit by hand. Makes me wonder if we're losing some basic skills. Has anyone else had a moment like that, where you felt a gap between the old ways and the new tech?

Had a nav system start a reboot loop right after a pit stop in Denver

I was doing a quick post-flight check on a regional jet last Tuesday. The main flight management computer just kept cycling on and off, about every 45 seconds. It was a software hiccup from a recent update that didn't fully install. I had to pull the circuit breaker, do a full power reset on the whole avionics bay, and then reload the nav database from a fresh USB. It took almost two hours to get it stable. Has anyone else seen a reboot loop from a partial database load?

I thought those cheap fiber optic inspection scopes were junk until a hangar neighbor showed me his.

For years I stuck with the big brand scopes that cost over a grand, thinking anything under $300 was a toy. Last month, a guy working on a G650 next to me had a $250 one from a tool truck. He let me use it to check a connector in a tight spot on a Falcon 2000, and the picture was shockingly clear. It found a cracked ferrule I missed with my old mirror and light. I bought one the next week and it's already paid for itself on two jobs. Has anyone else had a good run with one of the budget inspection cameras?

Just finished my 500th flight line test on the same Garmin G1000 unit this week.

I was cleaning flux wrong for years until a guy in Anchorage called me out

I mean, I always just used the standard isopropyl and a brush, thinking it was fine if the board looked clean. But last month, working on a G1000 unit, this old timer from Alaska pointed out the faint white residue under my UV light. He said 'kid, that's active flux, it'll eat your traces in a year.' I had no idea my 'clean' boards were basically time bombs. Has anyone else switched to a specific flux remover they trust for long term avionics work?

Showerthought: I used to think those cheap thermal cameras were useless for our work

I saw a guy at the hangar in Mobile using a $300 one from a hardware store to spot a hot connector on a comms panel. He found a bad crimp in about two minutes that was causing intermittent static. I was totally wrong, it's a solid first-look tool before you break out the big guns. What other budget tools have you guys found that actually work for troubleshooting?

Got a weird intermittent fault on a G1000 autopilot in a Cessna 182 last month

Was doing a post-maintenance check flight out of Daytona, and the autopilot kept randomly disconnecting. No error codes, just a quiet 'AP DISC' alert. It happened four times in 30 minutes. I finally thought to check the pilot's control yoke disconnect switch wiring under the panel. Found a single pin in the connector backed out maybe a millimeter, just enough to lose contact with turbulence. Pushed it back in, secured the connector with a zip tie, and the fault was gone. Anyone else had a gremlin like that hide in a simple switch?

Just had a nav display go blank on a preflight check in Tampa

It was a Garmin G1000 in a Cessna 172, and the whole screen just cut out right as we were about to start the engine. I had to pull the circuit breaker and power cycle the whole avionics bus to get it back, which took about 15 minutes. Has anyone else seen a G1000 do that from a cold start?

Vent: My shop's new $8k thermal camera found a bad connector my old multimeter missed for a month.

After chasing intermittent faults on a G1000 install with just voltage checks, the thermal imaging clearly showed the overheating pin during a full system load test, so is visual heat mapping becoming essential or are we over-relying on fancy gear?

Update: A Cessna 172's comm radio went completely dead on me during a pre-flight check last Thursday.

The pilot was waiting and I found a blown 5-amp fuse in the avionics bay, but replacing it just made it pop again instantly. I had to trace a short in the co-pilot's headset jack wiring, which took about two hours. Has anyone else had a simple fuse replacement turn into a major wiring hunt on a small plane like that?

Just watched a guy at my hangar try to torque a D-sub connector with a 3/8 drive ratchet. Heard the crunch from across the room.

It was a 15-pin connector for a nav system. The spec sheet says 15 inch-pounds, max. He had a foot-long breaker bar on it. Now we're waiting on a $2k LRU because the backshell cracked the board. How is this not basic? Do they not teach hand feel anymore? What's the dumbest connector kill you've seen?

I just cleaned my 500th pitot-static system and realized how many planes that is

Heard a pilot at the FBO in Daytona talking about a weird EFIS flicker during climbout

He said it only happened above 8,000 feet on a hot day and cleared up after leveling off. I was just grabbing coffee, but it got me thinking about temperature and pressure effects on older display units. Has anyone else run into an intermittent G1000 issue that seemed altitude-related?

Found a better way to trace intermittent faults on the G1000

I used to just swap parts until the problem went away, which took forever on a King Air 350 last year. Now I set up the Garmin GTS 800 traffic system to log data for a full flight cycle before I touch anything. It showed a single bad packet from the right transponder that I would have missed. Anyone else use the built-in logs more than the test set these days?