BOOM 777 SERVICE MANUAL
4-10 Published 10-01-2012, Control # 045-08
Dents
Refer to Figure 4-9.
For tubular lacings or chords, dents must not be deeper than
the wall thickness or 1/8 in (3.2 mm), whichever is less.
For angular lacings or chords and all platework, dents must
not be deeper than 1/8 in (3.2 mm).
Gradual and Sweeping Bends
Refer to Figure 4-10.
For tubular lacing, gradual and sweeping bends must not
deviate from straight more than 5 percent of the lacing
diameter.
For angular lacing, gradual and sweeping bends must not
deviate from straight more than 5 percent of the angle leg
length.
Gradual and sweeping bends in lacings can be straightened
by cold bending them back into alignment. Take extreme
care not to kink or further damage the lacings.
Corrosion and Abrasion
Refer to Figure 4-11.
Corrosion and abrasion must not be deeper than 10 percent
of the wall thickness, the angle thickness, or the plate
thickness.
FIGURE 4-9
P322
Dent
DENTED LACING
FIGURE 4-10
B231
Straight
Line
BENT LACING
Bent
Lacing
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