DA40 Diamond Star
Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 20; Flight Crew Total 6400; Flight Crew Type 300
Confusion; Human-Machine Interface; Situational Awareness
Aircraft Equipment Problem Less Severe; Inflight Event / Encounter Other / Unknown
General None Reported / Taken
Aircraft; Human Factors
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.
Instructor reported an unexplained loss of all GPS information during the last two hours of a flight.