BOOM 999 SERVICE/MAINTENANCE MANUAL
4-14
Published 05-16-17, Control # 233-03
Flatness
See Figure 4-14 for the following procedure.
1. Lay strap on a flat surface. Do not block; strap may
sag!
2. Stretch a line (string or wire) across top surface of strap
from pin storage hole at one end of strap.
3. Stretch line as tight as possible and tie it off at other end.
4. Check that line touches top surface of strap at all points
along its length.
5. If string does not touch strap, measure distance from
line to strap.
If deviation from straight is greater than maximum
allowed, remove strap from service.
6. Remove line. Turn strap over.
7. Repeat steps 1-5 above.
FIGURE 4-14
Distance between
Line and Strap
Line
A1086
Flatness (includes twisted straps)
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