IMHO the key to this scenario is which direction(s) was O'Hare landing and taking off. Then layout the protected area for the instrument approach and missed approach to see how it would effect Midwys traffic. Al ----- Original Message ----- From: "Kees de Lezenne Coulander" <listbox@xxxxxxxxxxxxxxxxxxxxx> To: <AIRLINE@xxxxxxxxxxxxxxxxx> Sent: Wednesday, June 21, 2006 4:47 PM Subject: Re: November 2001 crash > 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