PSA: I'm done with the 'just replace the whole unit' mindset for basic LRU faults.

I keep seeing guys at my hangar in Phoenix swap out a whole line replaceable unit for a simple fault that a $30 part could fix. Last week, a nav radio failed self-test with a bad encoder chip. The book said replace the LRU, a $5,000 part. Instead, I pulled the shop manual, found the chip was socketed, sourced a new one from a local supplier for $28, and had the box back on the plane in 90 minutes. The push to just swap units is about speed, but it kills real troubleshooting skills and costs the operator way more in the long run. We're technicians, not parts changers. When did we stop actually fixing things? What's the most basic component repair you've done lately that saved a full unit replacement?

4 comments

4 Comments

margaretr761mo ago

What's the shop manual you used for that?

bell.felix1mo ago

That "parts changers" thing is everywhere now, margaretr76. My washing machine guy wanted to replace the whole motor for a bad $15 bearing.

jesse_smith1023d ago

Honestly, that "parts changers" line really hits home. A buddy of mine who works on small engine stuff had a mower come in with no spark. The shop wanted to swap the whole ignition module for like 200 bucks. He popped it open, found a single cracked resistor the size of a grain of rice, and soldered in a new one for pennies. Tbh it took him longer to find his soldering iron than to do the fix. It's crazy how that mindset has spread to everything.

river_thompson1mo ago

Parts changers" is so true. When did fixing things become a lost art? Good on you for actually using the shop manual.