They are usually built to withstand an impact of 3600 g and temperatures of over 1,000 Â C ( as required by EUROCAE ED-112 ) , because a powerful impact followed by a very hot fire is what usually happens in a plane crash . They are typically specified to withstand an impact of 3400 g and temperatures of over 1,000 Â C ( 1,832 Â F ) ( as required by EUROCAE ED-112 ) .