Repairs must not result in distortion or misfit of
parts at assembly. If a hole is distorted as a result
Inner and Outer Ducts
of welding, use a file to restore it to its original
configuration. The weld bead must be blended by
Operational cracks in the inner and outer
hand after the welding. See figure 10-9.
outlet ducts are permissible. The cracks may not
1. Maximum length of crack 2 inches.
3. Only one crack per section permitted, and it must
2. Cracks, maximum of 33 percent and not more
than three adjacent holes.