Technical data

13773-001
56-20
Page 930 Nov 2000
(aa) Mix sealant per manufacturer's instructions. Mix the required quantity in the ratio specified
in the adhesive manufacturer's instructions. (Refer to 20-10)
CAUTION: Do not apply sealant to window bonding flange. The sealant must be
applied to the fuselage bonding flange.
(ab) Apply a thin layer of sealant to the outer edge of the fuselage bonding flange. Spread the
sealant out using an application spatula.
(ac) Directly on top of the sealant previously spread, apply a 1/4-inch to 3/8-inch bead of seal-
ant down the center of the bond area.
Note: If more than one bead is required, apply it immediately adjacent to the prior
bead to form one large bead.
(ad) Using padded cargo rods, secure the window into position making sure the reference
marks made earlier are perfectly aligned and that the contour of the window matches the
contour of the fuselage.
CAUTION: When spreading the sealant, ensure all air pockets are removed.
Note: Five or more padded cargo rods may be necessary to hold the window into
the proper position. Padded cargo rods may be placed on each corner of
the window and in the center of the window. Additional padded cargo rods
may be required to prevent the window from sliding down.
(ae) Using a 1-inch application spatula, push sealant into the gap between the window and the
fuselage.
(af) Remove masking tape and fine line tape from the perimeter of the window and the fuse-
lage.
Note: To prevent sealant from becoming damaged, pull tape towards sealant
while the sealant is still damp.
(ag) Allow the sealant to air dry. Following the manufacture’s instructions, the sealant can be
heat cured using a heat gun.