Richard de Crespigny

It took a long time to build up that trust.

And in some parts of the Airbus software, the aircraft will not let you stall the aircraft.

Stalling is when you get to such a high angle that the air coming over the wing breaks down and you lose lift.

So the Airbus will protect you from high speed or high angle of attack.

None of the aircraft at the moment will interfere and stop you hitting the ground.

Any commercial aircraft.

Any commercial aircraft.

Well, the problem is, you see, and it has gone wrong in one of the A320s early on, where the software wouldn't reconfigure and the aircraft, the software wouldn't let the pilot land.

To actually land the A320, you had to shut down an engine.

Now, that makes no sense other than when you shut down the engine, you shut off these protections so he could land.

I'm getting a little bit complicated here, but I'm saying that overall, all this software works 99.99% of the time perfectly.

Sometimes there's glitches, but you know, there are...

5 billion people flying every year around the world, 40 million flights.

I reckon we might be at 6, 7, 8, 6.

Well, that's sort of- Because we're getting-

You're only having two or three aircraft a year crashing.

That's about 500 people.

Tragic, absolutely, for the people killed.

But for 500 people that are killed out of 5 billion that fly, we could work out the sigma.

I just can't do it in my head.