The 717, if cruising above FL340 will almost always catch the cabin on a descent to Sea Level when the 250KIAS/10,000ft limit has been removed. I descend at about 20nm short of the FMS descent point using -1000FPM VS until reaching the descent profile. This allows the cabin to start coming down before getting into the descent-proper if doing a high-speed descent.
I use a similar check system to Earthmover, except for 400-500ish ft/min cabin ROD, I find that 11 times the Cabin Altitude should equal the track miles to touch. eg CA at 6000ft, TM should be 66nm or TMx9: 50nm=4500ft.
Last edited by Capn Bloggs; 21st Aug 2006 at 14:56.