5-64. STOWAGE BOX ASSEMBLY MAINTENANCE-continued.
(2) Repair of Holes.
(a) Cut away the affected areas to remove all jagged edges. If metal is bent, straighten.
(b) Sand both sides of the area with sandpaper to remove all sharp edges.
(c) Apply one coat of primer (Appendix F, Item 6) to both sides of the sheet metal Refer to TM
43-0139 for proper painting instructions Allow primer to dry.
(d) Cut two patches that are alike. Be sure that they extend at least 1 inch (2.54 cm) over the
edges of the hole all the way around.
(e) Place the patches in position and drill holes not further than 14 inches (3.81 cm) apart for
mounting the rivets.
(f) Apply one coat of primer (Appendix F, Item 6) to both sides of the patches and allow to dry.
(g) Refinish both the inside and outside of the primed and patched area with olive drab paint
(Appendix F, Item 3). Allow paint to dry.
Paint before applying sealant. Paint will not adhere if applied after sealant is used.
(h) Apply sealing compound (Appendix F, Item 7) between both patches and the sheet metal.
(i) Install the patches with rivets.
(j) Wipe off excess sealing compound using wiping rag (Appendix F, Item 2).
(3) Repair of Welds.
(a) Remove all paint from at least 4 inches (10.2 cm) on each side of the damaged area.
Remove paint before welding. Burnt paint will emit toxic fumes.
(b) Weld the crack using aluminum welding techniques. Refer to TM 9-237 for proper welding
(c) Refinish the repaired area with one coat of primer (Appendix F, Item 6). Allow primer to dry.
(d) Refinish area with olive drab paint (Appendix F, Item 3). Refer to TM 43-0139 for proper
painting instructions. Allow paint to dry.