TM 1-1520-240-BD
(b) Damage measurements apply after
cleanup and smoothing or after BDAR has been
accomplished;
however,
as
a
practical
matter,
measurements must often be taken before smoothing to
make a decision on deferability. Hence, when
estimating
damage
limits
before
cleanup
and
smoothing, make allowance for the material that will be
removed in smoothing. This applies particularly to
cracks; the length of the crack must be included in the
depth (CD) and length (CL) measurements. When
measuring damage, use the following procedures if
possible:
1
Clean
all
damaged
areas
thoroughly. Use brushes and rags to remove dirt and
film from small crevices where damage may be present.
2 Measure damage after smoothing
or if measuring before smoothing, make allowance for
the material which must be removed during smoothing.
3 Use a steel rule graduated in tenths
of an inch and measure each damage dimension to the
next higher tenth.
4 Include the size of the hole when
measuring damage that extends into a fastener hole or
lightening hole.
5 Record on DA Form 2404 (Figure
2-4).
(2) Webs, Panels, Floors, and Decks.
(a) Refer to Figures 2-7 and 2-8 for the
measurements of "WL" and "D." "WL" is the largest
dimension across the damage, regardless of direction
and must include all radiated cracks. "D" is the distance
between damages. Take and record measurements as
described in paragraph 2-2.
Figure 2-7. Measuring Skin Panel Damage
2-11
