The no. 2 prop had to be feathered because the engine RPM exceeded 3000 and couldn’t be controlled. The no. 1 engine then overheated and lost power. A ditching was carried out off Fort Lauderdale. PROBABLE CAUSE: powerplant – miscellaneous: powerplant failure for undetermined reasons FACTORS: powerplant – propeller and accessories: other miscellaneous acts,conditions – rpm-uncontrollable-overspeed miscellaneous acts,conditions – aircraft came to rest in water complete power loss – complete engine failure/flameout-1 engine emergency circumstances – forced landing off airport on water