The 170 meter long, 30109 dwt freighter Fortune Express became disabled in the Bosphorus (Istanbul Strait) after suffering an engine failure.   The authorities halted traffic and dispatched two tugs to secure the vessel.   The tugs were able to tow the vessel to an anchorage near Kireçburnu, Turkey.   No reports of injuries, damage or pollution being released.   The Fortune Express was en route to Iskenerun from Karadeniz Eregli with 14170 tons of coal.