N804AN exited PAE to ORD on 3/4 with retrofits
N805AN exited PAE to ORD on 2/28 with retrofits
N817AN entered PAE for retrofits on 3/1
N815AA has been in SAT since 2/14 (will retrofit be done with other maintenance?)
N818AL has not flown since 3/3 but is still in DFW.