Originally posted by Evan
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Do you know what happens if you use full brakes and full reverser in one engine but the spoilers don't extend and you leave forward thrust in the other engine? An A320 burns in a building across the avenue.
When you land in a contaminated runway, you calculate the landing distance taking into account the contaminated runway, applying the margins stated before and then multiplying by another 1.15. Except that the regs in this case let (or used to let, not sute if they removed it) take into account the reversers if their application can be proven to be reliable. Do you know what happens when the pilot fails to engage the reliable reversers? They squash a boy inside a car just out of Midway.
And what do you want to show with that photo? That the plane achieved taxi speed 250m / 750ft short of the other plane doesn't mean that the pilot could have not stopped shorter if needed. It is possible (not saying that it happened) that, once it was clear that the plane would stop with runway to spare behind the other plane, the pilot didn't keep applying maximum braking/spoilers/reversers.
And of course, if the spoilers failed and that made the plane not able to stop behind the other one, that doesn't mean that the pilots would just sit there watching the show. There is steering which can be provided with the nosewheel, the rudder, differential braking and differential thrust. I am sure the pilots will choose to end in the grass rather than in foreign aluminum.
And remember it is me the one here criticizing this pilot the most for not going around. But you asked "with what margin" and I just replied.
Never mind the margins, never mind if the other plane was 2000 ft farther down the runway, this pilot should have gone around, unless he really thought that they were likely to die if they didn't, which I doubt. And even then, he should have advised ATC that he was landing depite the instruction to go around. Again, one word: unable. Then ATC could have ordered the plane stopped on the runway to get the hell out of there (or, more likely, the pilots of that plane would have done that by themselves when they heard the other pilot saying "unable").
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