"MATL AL ALLOY; C/O CORE,3; INNER SKIN,3; OUTER SKIN,DOUBLER; CORE MATL SIZE 0.750 BY 0.005 BY 22.000 BY 42.000 IN. LG; DOUBLER MATL 0.050 BY 40.000 BY 78.000 IN. LG; OUTER SKIN MATL SIZE 0.032 BY 40.000 BY 78.000 IN. LG;USED ON LOWER SURFACE INBOARD FLAP NO 1"