5. Direct carbon dioxide or argon gas into fuel
compartment at 30-60 cubic feet
(0.841 .68 cubic meters) per hour until gas
escapes from fuel filler opening.
R E P A I R
Weld on outside of fuel compartment, if
Choose type of repair, overlapping or fitted
Resize hole in fuel compartment, to remove
sharp edges or cracks, for type of patch
Prepare a piece of aluminum of the same
alloy and thickness as the side of the fuel
Size patch to cover hole in fuel
Tack weld a small piece of aluminum
upright to center of patch to hold patch for
Weld patch to fuel compartment
(see TM 9-237 and your 20).
Break support away from patch. Discard
Seal weld patch with sealing compound.