Patent ID: 8489259

Claim:
A commercial aircraft having a black box comprising a flight data recorder connected to suitable acquisition units for recording information required for crash investigation purposes inside a container, wherein: the aircraft comprises a crash detection device; the black box is installed in a suitable location for being ejected outside the aircraft in a crash event through a duct having its exit in a fuselage area where the ejected black box would not impact on the aircraft; the aircraft also comprises ejection means, controlled by a black box ejection control unit connected to said crash detection device, for ejecting the black box through said duct, when an impending crash is detected by said crash detection device; said duct is an exhaust duct of an aircraft air conditioning system located in the rear part of the commercial aircraft and having its exit in the fuselage area subjected to negative aerodynamic pressure on the duct exit; the black box is installed over a frangible area of said exhaust duct; and said ejection means are suitable for breaking or displacing said frangible area to allow that the black box falls into the exhaust duct.