A Lufthansa Boeing 747-400, registration D-ABVW performing flight LH-447 (dep. Oct 18th, arr Oct 19th) from Denver,CO (USA) to Frankfurt/Main (Germany), was preparing for departure from Denver with a delay of about one hour. While the engines were started an odour of dirty old socks developed on board, the departure preparations . . .
Sources:
Incident 1: http://www.avherald.com/h?article=4b031ae9&opt=0
Incident 2: http://www.avherald.com/h?article=4b031f32&opt=0