Originally Posted by
onetrack
They are designed to withstand virtually all aspects of potential destruction in even the worst type of severe crash .. and since tape devices have given way to solid state devices, the info is even more recoverable ..
They are designed to withstand salt water for 30 days .. extreme pressures .. and extreme temperatures .. that are beyond the maximum found in any known aircraft crash.
Not true at all. Two accidents at least in Canada have had CVR tapes destroyed by being in heat for too long. Air Ontario F28 in Dryden and MK Airlines 747 in Halifax.