Originally Posted by
airbow
I think you're confusing CVR (Cockpit Voice Recorder) and FDR (Flight Data Recorder). The latter stores a lot more data than the CVR and probably has similar specs for every airplane mentionned in your post. Looking up the ATR's CVR's reference, it does only record for 2 hours.
Flight data from the planes involved in the recent runway incursions and near-CFIT incidents, may have already been extracted through QAR for FDA/FDM purposes.
Exactly. Current standard is 2 hours of voice and 25 hours of data. No doubt that will continue to change as memory gets smaller and cheaper.