Cessna pilots reported both of their GPS's failed temporarily.

Attributes
ACN	1720289
Time
Date	202001
Local Time Of Day	0001-0600
Place
Locale Reference	BIL.TRACON
State Reference	MT
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Cessna Aircraft Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Route In Use	Direct
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Captain Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

In cruise flight with the autopilot engaged GPS 1 and 2 displayed messages they had lost integrity and were no longer providing navigation. I immediately disengaged the autopilot and switched to vloc navigation direct to bil vortac. The first officer pulled out the low enroute chart to determine the nearest victor airway to navigate to. Within a few minutes both GPS units were receiving signals and were navigating accurately. I notified ATC of the issue and they acknowledged it and advised us to report any additional issues. We continued the flight and landed without incident and wrote up the aircraft.

Original NASA ASRS Text

Title: Cessna pilots reported both of their GPS's failed temporarily.

Narrative: In cruise flight with the autopilot engaged GPS 1 and 2 displayed messages they had lost integrity and were no longer providing navigation. I immediately disengaged the autopilot and switched to VLOC navigation direct to BIL Vortac. The First Officer pulled out the Low Enroute chart to determine the nearest victor airway to navigate to. Within a few minutes both GPS units were receiving signals and were navigating accurately. I notified ATC of the issue and they acknowledged it and advised us to report any additional issues. We continued the flight and landed without incident and wrote up the aircraft.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.