Duncan Aviation recently saw a Nav unit in our avionics shop that failed soon after being repaired by another service provider.
A Duncan Aviation technician found some screws had been installed incorrectly. The previous shop had swapped some longer and shorter screws, screwing the longer ones into an incorrect location, driving them into a circuit board; it took only a short time after installation for the unit to fail.
We caution our customers that experience in component service can make a big difference in the reliability of a component, and ultimately the reliability of an aircraft.
If you would like more information about Duncan Aviation's Components Solutions services or have technical avionics, accessory or parts questions, remember that Duncan Aviation does offer free troubleshooting at 800.228.1836 or 402.475.4125.