6 Month C/W: 10/30/2009 at 4,601 hours 144 Month C/W: 2/19/2010 at 4,650 hours ASC 189, CB 178 & AM1, ASC 173 and ASC 181A C/W: 10/30/2009 ASC 189: Wing Rear Beam Modification Flight Spoiler Actuator Attachment Po=nt CB 178 & AM1: Wings (ATA 57) Modification - Wing Rear Beam - Flight Sp=iler Actuator Attachment Point (ASC 189). ASC 173: Water / Waste (ATA 38)