The point that I'm making is that full flaps, gear down, idle thrust at 140 kts will give you a steady rate of descent of 2200 fpm.
At 3000 fpm your KE will increase at the rate of 68 kt per minute. Perhaps you should use the airbrakes.
P.S.
I'm pursuing this discussion only because I don't feel it would be good advice to the OP to accept an ATC request that requires him to descend in the landing configuration at 3000 fpm.
Last edited by HazelNuts39; 30th Jul 2013 at 22:04.
Reason: P.S. added