Garmin G1000(H), Cirrus Perspective, Embraer Prodigy, G900X, and G950 with GDU software versions 13.00 through 15.01 are affected.
Using the checklist function may cause the flight timer to set back to zero during flight. The flight timer provides total flight time between avionics power cycles.
Only the flight timer is affected. All other timers work as intended.
Do not rely on the flight timer to provide accurate flight time.