Zymbly

Aviation maintenance is a $88 billion industry in the US alone—and it's still running on paper manuals, tribal knowledge passed down in hangars, and technicians spending more time documenting than actually fixing planes. That's a problem because when an aircraft sits on the ground, airlines lose serious money. Enter Zymbly, the AI copilot that handles troubleshooting, parts lookup, and documentation so technicians can focus on the aircraft.

Here's how it works: Zymbly connects to manuals, maintenance systems, local procedures, and past work orders—basically all the scattered data a technician needs but can never find when they need it. Their system surfaces the right information in seconds. They claim it turns a 4-hour diagnostic job into 45 minutes. That's not a typo. On a recent example, Zymbly analyzed 8 similar faults and correctly identified a corroded connector pin as the root cause—instead of the transponder that everyone was ready to replace. That's the difference between a $500 fix and a $50,000 mistake.

Y Combinator saw something here and backed them. The boring industries are where the real money lives, and aviation maintenance might be the most boring—and most critical—one of all. Every minute an aircraft isn't flying is money lost. Zymbly just gave those minutes back.