Gerard M Foley <gfoley@xxxxxxxxxxxxxxx> wrote: (referring to the SW 737-700 overrun at Chicago Midway) >I still don't know why any pilot or controller chooses to accept a 25 >kt. tailwind, even if it isn't snowing. No one ever did. Winds were from the East at approximately 10 kts. For runway 31C this works out as a tailwind component of around 8 knots. Although within prescribed operational limits, the situation was obviously less than ideal. This translates into a reduction in safety margins, which in the event proved insufficient to cope with further problems (a delay in the activation of the thrust reversers). As a result, and at the urging of the NTSB, the FAA has just published new rules to increase the safety margins under these adverse conditions. Kees de Lezenne Coulander