` ` This is beginning to look very , very much like a hijacking , '' says Mr Porter . ` ` Mechanical problems are narrowing quickly , '' says former IT ##S managing director . Transponders : ` ` They 're not supposed to work , but they do . ''
`` This is beginning to look very , very much like a hijacking , '' says John Nance . `` Mechanical explanations are narrowing quickly , '' says former safety board managing director . Transponders : `` They 're not supposed to break , but they do break ''