An Aer Lingus Airbus A330-300, registration EI-EIL, performing flight EI-107 from Dublin to New York JFK (JFK), was en route at FL340 about 80nm northwest of Shannon when the crew decided to return to Dublin. The aircraft landed safely on Dublin's runway 10L about one hour after departure.
A listener on the frequency reported that the crew said the weather radar had failed twice. They had heard a loud clunking noise during climb out from Dublin and noticed some odour. The weather radar subsequently failed for a brief period of time and came back online. A burning smell occurred and quickly dissipated, and the weather radar failed a second time.