Frankfurt / Main (AP) - A jumbo jet with 370 passengers of Lufthansa is reversed shortly after the start at Frankfurt airport because of a power plant failure. An acute emergency, the airline had ruled on dpa request. The pilots of the flying towards Shanghai Boeing 747-400 had "as a precaution decided to return," it said. According to the company spokesman, shortly after the launch, there had been "a kind of misfire" within one of the four engines. To prepare the fully-fueled aircraft for landing, kerosene has been drained.