On February 10, 2011, a Fairchild Swearingen SA-227BC Metro III, performing flight A4-25 from Belfast, Northern Ireland to Cork, Republic of Ireland crashed upon attempting to land at Cork Airport. Of the 10 passengers and 2 crew members on board, both pilots and four passengers died. Investigation by the Air Accident Investigation Unit Ireland (AAIUI) revealed that the right engine had consistently been developing more torque than the right engine. There was a leak in a component in the temperate sensor of the fuel control unit, causing the sensor to output incorrect temperate to the sensor, which resulted in incorrect scheduling of fuel flow. This asymmetrical torque of the engines caused the accident aircraft to rapidly roll to the right and crash.