PJ2, I reviewed our posts 715-720 and your response was if he drifted one or two thousand feet high the CAS increase with trapped pitot and drain pressure could not significantly be increased. I agree but how about mach limit? That will be the first limit you hit and DJ77 said with less than a 2500 ft climb that limit would have been exceeded by a significant margin. I don't know how to verify that information but when the CVR report comes out we will know. If someone knows how please post it. DJ77, where did you find it?