Instructor reported an unexplained loss of all GPS information during the last two hours of a flight...

Attributes
ACN	1649240
Time
Date	201904
Local Time Of Day	1201-1800
Environment
Light	Daylight
Aircraft 1
Make Model Name	DA40 Diamond Star
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	Direct
Flight Plan	None
Component
Aircraft Component	GPS & Other Satellite Navigation
Person 1
Function	Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Flight Instructor Flight Crew Instrument
Experience	Flight Crew Last 90 Days 20 Flight Crew Total 6400 Flight Crew Type 300
Events
Anomaly	Aircraft Equipment Problem Less Severe Inflight Event / Encounter Other / Unknown

Narrative:

Even with two GPS receivers; suddenly I lost all GPS information (no error messages) and it continued to be off for the remaining 2 hours of the flight. However; in a dozen flights since then; the problem has not recurred.

Original NASA ASRS Text

Title: Instructor reported an unexplained loss of all GPS information during the last two hours of a flight.

Narrative: Even with two GPS receivers; suddenly I lost all GPS information (no error messages) and it continued to be off for the remaining 2 hours of the flight. However; in a dozen flights since then; the problem has not recurred.

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.