I'm not sure. And until the day that I hope never comes that I'm flying a CRJ over mountainous terrain, I won't care.

Point I was making was that even when two different companies are operating the SAME aircraft type, what the plane can actually do in real life and what each of their performance data says they can do are not always the same.

At my former employer, AWAC's CRJ's could go into places that ours couldn't Why, simply because they were using a different (and probably more expensive) vendor.

Thread drift complete.