US Airways B762 near Shannon on May 25th 2014, navigation system problems

A US Airways Boeing 767-200, registration N253AY performing flight US-711 from Zurich (Switzerland) to Philadelphia,PA (USA) with 110 people on board, was enroute at FL350 about 120nm west of Shannon (Ireland) about to enter Oceanic Airspace when the crew decided to turn around and divert to Shannon reporting they had no navigation available and requesting vectors to enter a hold to burn off fuel. The aircraft descended to FL120 and entered a hold for about 70 minutes before continuing for a safe landing on Shannon's runway 06 about 105 minutes after the decision to turn around and divert.

The remainder of the flight was cancelled, the passengers were rebooked onto other flights.