Nothing wrong with CDA, but the queue cannot be managed with ac on idle descent to threshold, which is the FAA mantra to 'save fuel"
I have plenty of RNP AR procedures that are CDA. What you have to do is idle descent from the STAR down to FL10, then manage the descent below FL10. You will actually save much more fuel, and ATC will be able to manage the queue.
Some countries in Europe do not allow idle descent below 3000 feet, as the engines are not at clean burn, and actually emit more pollution at idle...
Last edited by FlightPathOBN; 31st August 2012 at 17:29.