In video pilot says plane is `` secure , '' and that it 's dumping fuel . " The pilots are not saying they're going to dump the fuel. Sound on tape indicates pilot 's explanation did n't cause alarm . Qantas grounded its planes for as long as it takes to perform investigation , official says .
In video pilot says plane is `` secure , '' and that it 's dumping fuel . Pilot announces to 440 passengers there is a `` technical issue '' with engine . Sound on tape indicates pilot 's explanation did n't cause alarm . Qantas grounded its planes for as long as it takes to perform investigation , official says .