Apologies if posted elsewhere.
As reported by the BBC:
The black box recovered from the wreckage of the plane crash that killed Brazilian presidential candidate Eduardo Campos did not record his flight, Brazilian Air Force (FAB) says.
It said the audio recording FAB experts had analysed was not related to the flight that crashed on Wednesday.
A spokesman said they were trying to determine what the recording was.
BBC News - Brazil crash: Black box 'did not record Campos flight'