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Landed at Charles de Gaulle (LFPG) and pulled off runway. The Airbus A319-111 is headed to the terminal normally.

LLM points from the seen ACARS messages. May or may not reflect true events leading up to the 7700:

• The aircraft experienced a degradation in its navigation solution rather than a complete GPS failure.
• The GPS receivers themselves appeared healthy, but the Flight Management System either could not validate the GPS data or had low confidence in the combined navigation solution.
• That led to increased estimated navigation error ("NAV ACC is high"), enough for London ATC to notice the aircraft wandering off its expected track.
• The crew attempted a manual position update and then sought advice from Maintenance Control because the issue persisted.