As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT WAS SNAGGED THAT IT LOST ITS HEADING INDICATION MOMENTARILY DURING FLIGHT AND THAT IT HAD A GDL90 FAILURE. THE AIRCRAFT IS G1000 EQUIPPED AND IS AT S/W VERSION 563.35 (LATEST CESSNA S/W) DONE IN FEB 2018. WE ARE UNABLE TO REPLICATE THE ISSUE ON THE GROUND. WE RE RACKED THE GIA`S AND TRANSPONDER. (TC# 20190408008)