Lyman,
The steady headwind doesn't matter. At ISA+15.6°C a sudden head-on gust of 30 kt would have increased Mach from 0.815 at 02:10:02 to 0.866 (Overspeed warning threshold Mmo+0.006).
Please note that in two zoom-climb incidents overspeed warning was triggered without triggering the overspeed protection.
Last edited by HazelNuts39; 6th Jun 2012 at 10:21.