SYNOPSIS
The flight crew of G-VIIK experienced a series of smoke events on the flightdeck while in the cruise over mid-Atlantic. They declared an emergency and the First Officer (F/O) donned his oxygen mask. They descended the aircraft to Flight Level (FL) 150 and diverted to Shannon Airport (EINN), Ireland. The cause of the smoke was later identified as a bearing failure of the primary equipment cooling supply fan.
