15-8 Figure 15-11.  WAI ducting. Inner telescoping duct Telescoping duct door Wing front spar Pneumatic duct Wing TAI supply manifold duct Wing TAI supply manifold  Ground overheat thermal switch Wing anti-ice control valve Slat  Slat anti-icing spray ducts  Slat inner skin Outer telescoping duct TAI airflow between beam  and slat upper skin Spacers between  skin and beam Slat beam A A