United B772 near Dublin on Nov 6th 2014, smoke in cockpit

A United Boeing 777-200, registration N791UA performing flight UA-925 from London Heathrow,EN (UK) to Washington,DC (USA) with 140 people on board, was enroute at FL360 about 70nm southeast of Dublin when the crew reported smoke in the cockpit and diverted to Dublin selecting runway 16 due to winds (16 knots from 170 degrees), the aircraft needed to do a couple of orbits to lose altitude. Dublin Airport kept both runways sterile sending arriving aircraft in holds and holding departures. The aircraft dumped fuel until capturing the localizer. The crew aborted their ILS approach to Dublin's runway 16 about 25 minutes after leaving FL360 requesting runway 10 now. While the aircraft positioned for an ILS approach to runway 10 the crew reported there were no visible flames just smoke in the cockpit, they anticipated a normal landing and continued for a safe landing on runway 10 about 10 minutes after the go-around. The aircraft vacated the runway and stopped on an adjacent taxiway for inspection by emergency services, landings of other arrivals on runway 16 resumed immediately afterwards.

Following the initial inspection by emergency services the crew requested emergency services to follow the aircraft to the gate stating they had smoke and fumes in the cockpit and cabin, source unknown.