Black Box

Flight Recorder

Plan

• History • Specifications• Parameters' recorder• Voice’s recorder• Example of aviation recorders

History

• 1939 : One of the earliest and proven attempt was made by Francoise Hussenot.

• 1947 : Hussenot founded the « Société Francaise des Instruments de Mesure » so as to market his invention.

• 1953 : The Australian engineer Dr. David Warren conceived a device that would record the instruments reading and the cockpit voice.

• 1965 : Black boxes were redesigned and moved to the rear of airplanes.

Plan

• History • Specifications• Parameters' recorder• Voice’s recorder• Example of aviation recorders

Specifications

EUROCAE’s specifications

• Be able to withstand an acceleration of 3400g for 6.5 milliseconds

• Penetration resistance• Static crush• High and low temperature fires• Deep sea pressure• Sea water immersion• Fluid immersion

Plan

• History • Specifications• Parameters' recorder• Voice’s recorder• Example of aviation recorders

Parameters’ recorder

• 28 parameters as a minimum under current U.S. federal regulations

• Sophisticated aircraft could have up to 1300 parameters! • Each parameter is recorded a few times per second• Example of parameters:

• Altitude• Speed• Hours• Pressure

Plan

• History • Specifications• Parameters' recorder• Voice’s recorder• Example of aviation recorders

Voice’s recorder

• Cockpit Voice Recorder (CVR)

– Permitted to record radio communication, cockpit voice and background noise (like motor, alarm…)

– Data are recorded on 4 magnetic tape channel

• Radio communication on channel 1 and 4• Communication with the aircrew on channel 1• Communication with the aircraft mechanic floor on channel 1, 2 and 4• Background mike on channel 3

Plan

• History • Specifications• Parameters' recorder• Voice’s recorder• Example of aviation recorders

Voice’s recorder

Voice’s recorder

Black Box

Flight Recorder

The solution to find the cause of accidents

Improve plan security

The voice of a crash