Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Córas Iompair Éireann 071 Class or Northern Ireland Railways 111 Class is a General Motors Electro-Motive Division EMD JT22CW series diesel-electric locomotive used in both the Republic of Ireland and Northern Ireland. Serbia utilises four similar locomotives as JŽ series 666. The Córas Iompair Éireann 071 Class locomotives were the principal passenger locomotives on the Irish railway network for twenty years from their introduction in the late 1970s. They displaced the older CIÉ 001 Class and NIR 101 Class locomotives and were themselves replaced in turn by the new 201 Class locomotives.