ECON cruise, LR cruise...
Join Date: Apr 2002
Location: MIRSI hold - give or take...
Age: 52
Posts: 568
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Runway changes are a part of everyday life, and as long as we're not talking inside, say, 15 trackmiles to go, an experienced crew should have no problems in accomodating a change.
One caveat, though - if it's a training flight, a runway change may overwhelm the trainee and devolve the flight to "involved single-pilot-ops", where the trainer still manages to communicate what is going on and keep the trainee in the loop, but where all learning value has long gone out the window. Not desirable, but managable.
Obviously keeping any semblance of CDA with a late runway change might prove impossible, and generally ATC accept this and plan accordingly, e.g. for an aircraft that has been given extra trackmiles to reduce ROD etc.