400 ft +or- depending on slope divided by 40seconds is around average 600 feet/min. The last few seconds the rate of descent is negligible allowing the approach rate of descent to be up around 700 ft/min and as I said we can't see if there is any slope on approach.
That sounds very much like time for "Too Low Gear" to me, or a "**** gear down", maybe just prior to the CAWs
Last edited by RENURPP; 15th Feb 2013 at 02:45.