AA20 - GPS Navigation System Failure During Transatlantic Flight

American Airlines Flight AA20, operating a Boeing 777-300ER (registration N725AN) from Dallas Fort Worth International Airport (DFW) to London Heathrow Airport (LHR), experienced a significant navigation system failure on August 24, 2025. The aircraft departed DFW at 23:08 UTC for the scheduled transatlantic flight when the GPS navigation system malfunctioned during cruise flight after being airborne for over two hours. The Boeing 777-300ER, powered by GE engines and approximately 12.1 years old, encountered the GPS system failure while approaching the oceanic crossing phase of the flight. Multiple redundant navigation systems including GPS and Inertial Reference Systems (IRS) are critical for safe transatlantic operations, and the crew determined that continuing across the North Atlantic without primary navigation would pose unnecessary risk. After consulting with air traffic control and company operations, the flight crew made the prudent decision to divert to New York John F. Kennedy International Airport. The crew coordinated the diversion with air traffic controllers over northeastern U.S. airspace and successfully landed the aircraft using backup navigation systems. All passengers and crew members deplaned safely at JFK with no injuries reported. The incident highlighted the importance of redundant navigation systems for oceanic flight operations and the crew's adherence to safety protocols when primary systems fail.