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Flight data recorder (FDR) and Cockpit voice recorder (CVR) are very important and play vital role in the investigation of the flight accidents. These are also used to locate the aircraft crash site and the circumstances in which the aircraft is crashed. There are many cases where the black box location is not identified. This project reveals simple, economic and safe ejection of FDR in case of aircraft crashes. A simple Pneumatic system with air bottle is used to operate both the hatch door and the ejection system. After the ejection, a parachute is used to land the black box little far away from the crash site debris in a safest location. Three sensors are installed on the aircraft to sense the temperature, deformation and frequency of vibration of the structure. The system is activated and ejection process takes place only when abnormal values i.e. temperature, deformation and frequency of vibration are recorded.

Design and Fabrication of Black Box Ejection System for a Civil Transport Aircraft