CVR Damaged?
Will not be known until unit examined, unless there is obvious visual damage such as protective case disintegration or crushing beyond tolerances.
Here are the crashworthiness standards required, may be old but any revisions would be of higher tolerances.
» an impact producing a 3,400-g deceleration for 6.5 milliseconds (equivalent to an impact velocity of 270 knots and a deceleration or crushing distance of 45 cm)
» a penetration force produced by a 227 kilograms (500 pounds) weight which is dropped from a height of 3 metres (10 feet)
» a static crush force of 22.25 kN (5,000 pounds) applied continuously for five minutes
» a fire of 1,100 degrees Celsius for 60 minutes.
The Germanwings A320 hit mountainous terrain at 370 kts and the CVR, despite sustaining damage was still readable.