Avionics upgrade
Maintaining Your AirplaneTesting the Hardware After a USM Retrofit
A Cessna 172 takes its first flight after an avionics panel upgrade with used-serviceable material (USM).
Richard Scarbrough![](https://www.flyingmag.com/uploads/2024/04/after-1-cr-Elijah-Lisyany.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
![](https://www.flyingmag.com/uploads/2022/09/Pilot-and-copilot_adobe-stock-rs.jpg?auto=webp&auto=webp&optimize=high&quality=70&width=1440)
Subscribe to Our Newsletter
Get the latest FLYING stories delivered directly to your inbox