TM 9-2320-280-34
e.
Repair Parts Preparation.
1.
Repair parts or patches should be painted with epoxy primer before installation.
2.
Apply sealing compound (Appendix B, Item 47) to mating surfaces to prevent corrosion.
3.
Install part or patch as detailed in 22-8.g and 22-8.h.
4.
Paint repaired area with epoxy primer.
5.
Paint repaired area with polyurethane as required.
f.
Repair of Negligible Damage.
1. Negligible cracks as defined in para. 22-6.b are repaired by drilling a small hole at each end of crack to
stop crack propagation. This is called "stop drilling". Table 22-5 gives proper drill sizes for 'stop drilling" cracks.
2. Negligible holes are repaired by rounding and smoothing edges of hole to alleviate stress risers caused
by sharp notches.
CAUTION
Heat will never be used to reform parts because it greatly
reduces part strength.
3. Small dents and distorted areas may be repaired by bending or hammering, as long as the operation
does not cause materials to crack or tear. Sharp bends should not be attempted.
22-13
