Black Boxes Set To Reveal MH17's Last Moments
Updated: 1:58pm UK, Wednesday 23 July 2014
By Tom Cheshire, Technology Correspondent
The black boxes of MH17 are now in Farnborough, being investigated by the UK Air Accident Investigation Branch.
What sort of data do they contain - and what might they tell us about MH17's last moments?
First, even if the black boxes were directly hit by the missile (they were both probably in the tail of the plane, as this section tends to survive crashes more intact), they should still have recorded data for some milliseconds or seconds after the crash, if not longer.
There are two black boxes. One is the cockpit voice recorder. This records every conversation in the cockpit during the flight, both between pilots, and between pilots and ground control.
It also records any ambient sounds. This could mean alarms, as well as the sound of any explosion.
We'll find out if the pilots had any warning of the missile.
The other black box is the flight data recorder. According to pilot Chris McGee, this is a "brain dump" for an airplane.
Around 150,000 parameters are logged, including outside air pressure and temperature, cabin air pressure and temperature, flight controls, and engine performance.
This data could help piece together how exactly MH17 came down.
The investigators should glean more detail from the black boxes. But it won't shed much light on the main facts we already know - that MH17 was shot down by a missile.
The black boxes cannot tell us who shot that missile.
So is it a futile exercise?
No. The information on how MH17 managed to survive, however briefly, after the missile strike, and how it fell to the earth, will be useful for manufacturers.
For example, the flight data from the Lockerbie bombing in 1988 helped aircraft makers redesign fuselages to be stronger and safer.
The circumstances of MH17 are extraordinary and horrifying. But the data from its black boxes will improve safety for the next flight.
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