I was tracing a flickering nav light on a 1998 King Air 350 last week. Pulled the panel and found a wire nut holding three twisted splices together. Worked fine for years apparently, but I told my lead and we had to redo the whole harness. Learned to never assume a previous fix is safe just because it still passes power. Has anyone else found sketchy field repairs that passed multiple inspections?
Had a $400 Fluke 87V that was reading perfectly for 2 years straight. Then last month I started getting weird voltage spikes on every reading, even on battery test circuits. Turned out I was using a cheap third-party test lead set that had a cracked insulation near the banana plug. It took me 3 days and a blown fuse to realize the before and after difference was just bad leads. Anyone else ever chase a phantom issue only to find out it was your own gear failing you?
Working on a Gulfstream G-IV out of West Palm Beach and I just passed 500 individual crimps and pin checks on the same harness rebuild. My fingers are basically useless for anything delicate now, I keep dropping my coffee mug. Idk if anyone else has kept a running count like that before, but hitting that number made me realize how much patience this job actually takes. Anyone else ever track their terminations over a big project?
I was chasing a ghost fault on a 737 NG's VOR receiver in hangar 4 at DFW last Tuesday. Kept getting intermittent readings, swapped three antenna cables before I checked my Fluke 117 against a known good circuit. Turns out the internal fuse was cracked, giving me false opens half the time. Has anyone else had a tool go bad in a way that made you second-guess everything?
Honestly, I thought I was being smart saving cash on a no-name multimeter from Amazon. For like a month, I was getting weird voltage readings on a nav system install and couldn't figure out why. Turned out the meter was off by almost 2 volts on DC settings. Ended up borrowing a Fluke from a coworker and everything worked fine. Has anyone else had a cheap tool mess up their work like that?
Last week at the hangar in Orlando, this old-timer named Dave showed me how he used to troubleshoot Collins analog radios with nothing but a multimeter and a schematic. He said the new Garmin G3000 boxes are faster but you lose the feel for what the system is actually doing. It hit different because I've been leaning hard on factory diagnostic software and skipping the fundamentals. Anyone else feel like we rely too much on plug-and-play testers instead of understanding the actual signal path?
Chased a garbled VOR display for 3 hours last Wednesday on a King Air 200 only to find pin 5 on the nav receiver harness was bent flat, has anyone else wasted a day on a simple pin issue like this?
I went with the Fluke 123 over the Tektronix THS720 because it handled the vibration better on a Gulfstream GIV in Savannah last week, has anyone else found one brand holds up better on the ramp?
Last week I had to run a new set of nav light wires through a tight wing root on a 172, and my fiberglass fish tape kept binding up. I remembered an old timer showing me to tie a fishing weight to some mason's line and let gravity do the work, got it through in under 10 minutes. Anyone else still use old-school methods like this?
Been in avionics about 4 years now, always used the $30 crimpers from the local shop. Figured they got the job done. Then last month a D-sub pin fell right off a harness during a test. Lost two hours troubleshooting. Senior tech Jerry told me to borrow his Daniels crimper. Night and day difference. The pin actually locked in. Anyone else have a tool upgrade that saved your ass?
Turned out to be a chafed wire behind the panel that I overlooked on the first three checks because the insulation was pin-hole sized. Has anyone else had a tiny wire fault take way longer than it should to find?
I was grabbing coffee last Wednesday and heard this lead tech from another hangar tell a new guy that our job is mostly just pressing test buttons and swapping boxes until something works. That really got under my skin because I've spent the last 6 months chasing an intermittent fault on a G5000 system where the logs pointed nowhere and I had to trace every wire back to the connector pins on the LRU. On one hand I get it, sometimes you do just cycle a circuit breaker and the problem goes away, but on the other hand the real skill is knowing which button to push and why based on system knowledge. Maybe I'm being too sensitive but it felt like he was selling the whole trade short to a rookie who needs to understand the depth of this work. How do you guys handle people who act like avionics is just plug and play? Am I wrong for getting worked up over a comment like that?
Back in '08 at the Miami hangar, this guy named Jerry who worked on 727s since the 70s pulled me aside and said factory crimps on cannon plugs are garbage. I laughed it off until last year I found a loose pin in a brand new Garmin harness on a King Air. Jerry was right, I check EVERY factory connection now or I pay for it later. Anyone else re-crimp fresh out of the box or just me?
Had a Cessna 172 in the hangar with intermittent transponder issues. Turned out a ground wire was frayed inside the bundle. $0 fix, saved the owner a $600 replacement quote. Anyone else find dumb simple fixes like that?
I was troubleshooting a G430W that kept giving bad GPS data on approach. The owner said it worked fine before. After 2 hours of checking antennas and coax, I realized the nav database was from 2019. Updated it to the current cycle and everything locked in immediately. Has anyone else had a simple database fix solve a nagging problem that seemed way bigger?
The damn thing kept showing a nav antenna fault but every connection tested fine - turned out the static wick had a hairline crack letting moisture in during deicing. Has anyone else had a fault that just kept leading you in circles like that?
I used to think spending 2 hours on autopilot trim calibration was overkill until a crosswind landing went sideways last month. Now I swear by it. What’s your take-do you cut corners here or go by the book like me?
I spent 6 years chasing wires with a basic tone generator and probe, always second guessing if I had the right wire when bundles got tight. Last month I finally picked up a digital signal map probe that injects a coded signal and it cut my wire tracing time from 45 minutes to under 10 on a 50-pin harness. Has anyone else made that switch and noticed a big difference in accuracy?
Guy told me I was wasting time buzzing every single pin because I wasn't looking at the voltage drop. Now I just use a milliohm meter and caught a 0.3 ohm discrepancy on a harness that would have passed normal testing.
Last month in Denver, I had a Cessna 172 where the factory diagram said the landing gear indicator wires should be on pins 4 and 6. But when I traced it, the actual plane had them on pins 3 and 7 from a previous repair. I ended up spending 3 hours troubleshooting because I trusted the book over my own eyes. How do you guys handle it when the schematics don't match reality, do you follow the diagram or trust what's in front of you?
Last Tuesday I showed up to swap out a radar unit on a 737 and the mounting screws were stripped from the factory. Then Wednesday the weather radar display on the test bench threw a fault code I've never seen in 8 years. By Friday I had three different LRUs fail the same self test after install, and the lead kept asking if I was skipping steps. The whole week was a mess of bad batches and weird glitches that made me second guess every reading. Has anyone else had a string of bad luck like that where the parts themselves were the problem?
I was pulling a G650 through a Phase 4 check at DFW and hit 4 separate ground faults on the same LRU tray in 6 hours. Each time I re-terminated, checked the harness, and swapped the module, it still tripped until I found a tiny nick in the shield drain wire near the backshell. Has anyone else had a run of bad luck like that on a single bird?
I was on the fence about getting a Flir thermal camera for a while. Finally pulled the trigger on a basic model for around $400. My first week I used it to find a hot resistor in a power supply that was causing intermittent GPS dropouts on a King Air. That one find saved me probably 10 hours of chasing wires with a multimeter. The old method would have taken forever swapping boxes. Has anyone else had good luck with thermal imaging on bizjet avionics?
I was wiring up a new Garmin G1000 harness at the hangar in Tucson last Tuesday and my lead handed me a box of Cletop cleaning sticks for the LC connectors. I figured a puff of canned air was good enough, but after three failed continuity checks on the LRU I gave his method a shot. Anybody else ignore a specific cleaning step for years and then kick themselves when they finally try it the right way?
I bought a Tektronix TDS 220 off eBay for $200 from a seller in Arizona. Turns out channel 2 was completely dead and the calibration sticker was clearly faked. Now I'm out the money and stuck using my old fluke meter for everything. Anybody got a reliable place to grab refurbished test gear?