Click here to read an interesting article about the ‘Greener Skies’ program fraudulently pushed by FAA, Port of Seattle (POS), and industry, and approved by FAA in late 2012.
‘Greener Skies’ was pitched, but it actually never really happened. David Suomi (now FAA Regional Administrator) admitted as much when doing his 4/25/2017 spiel for the Port of Seattle Commissioners. Conspicuously, ‘Greener Skies’ was focused ONLY on west-side arrivals. Why? Because if FAA had tried to create similar concentrated arrival streams over Bellevue, the entire proposal would have been killed by the residents below.
‘Greener Skies’ was supposed to bring enormous impact reductions. The key design element was to flow more than half of all Sea-Tac arrivals in over Elliott Bay, miles from homes, thus with almost no noise impact. Are they doing that, nearly six years later? No, not at all, not even in light traffic, and not even on clear Fall days perfect for flying. Why are the Elliott Bay arrivals so rare? Because the air traffic controllers have to fit all arrivals together, into the final landing flow; i.e., they need to merge both the west flow (especially the HAWKZ arrivals over Vashon Island) and the east flow (the CHINNS downwinds coming up from the southeast entry post near Mt. Rainier, as well as the GLASR feed from the northeast entry post near Leavenworth). The ‘Greener Skies’ design was fatally flawed, by the simple fact it intentionally DID NOT try to create RNP procedures for all the arrivals on the east side. The net result is kind of like having the tires aligned on your car… but not all tires, just the left side.
A half-assed design that cannot produce the desired results, and is simply doomed to fail. That is ‘Greener Skies’.