Originally Posted by
mnbp
Complete (9 of 16, 56%)
N661US (5/23/2012)
N662US (3/28/2012)
N663US (4/10/2012)
N664US (4/23/2012)
N665US (6/7/2012)
N666US (5/22/2012)
N668US (6/28/2012)
N670US (1/25/2012)
N674US (7/9/2012)
In mods (2 of 16, 13%)
N667US (6/28/2012)
N671US (7/9/2012)
Unmodified (5 of 16, 31%)
N669US
N672US
N673US
N675NW
N676NW
Sources: flyertalk, flightaware.com, planespotters.net and seat maps.