It doesn't clear every two hours, it's a rolling two hour recording. Since the plane was still operational, it continued recording and it was just over 2 hours before maintenance crews disabled the recorder.
OK, what you're saying is that the 2 hours of audio leading up to the crash were overwritten by the recording having continued for another 2 hours after the incident? So, it's just poor wording in the article?
amatecha|2 years ago