Destination Alternate mins- FAR 121.631
Hi,
I know I've posted this subject in the past but still looking for some clarifications..
FAR 121.631 states amongst other things that:
"No person may allow a flight to continue to an airport to which it has been dispatched or released unless the weather conditions at an alternate airport that was specified in the dispatch or flight release are forecast to be at or above the alternate minimums specified in the operations specifications for that airport at the time the aircraft would arrive at the alternate airport."
Now, speaking about alternate minimums: I know that once airborne, one can use his alternate down to minimums and doesn't need to have it above the alternate minimums (FAR 400-1/ 200-0.5 1 Navaid 2 Navaid rule).It's also written above. So, how come after taking off it changes?
Thanks!!