TM 1-1520-240-BD
(7) Inspecting for Broken and Missing
Fasteners.
(a) Fastener Damage or Loss. Some
fasteners join parts together in an assembly, and some
join one structural member to another. Sheared, pulled-
through, torn-out, elongated fastener holes, and the
damage or loss of fasteners can severely weaken the
soundness of a structure.
(b)
Riveted and Bolted Joints.
Inspect all riveted and bolted joints near the battle
damage. Look for sheared, pulled-through, tom-out
fasteners, and elongated fastener holes. Carefully
inspect members showing signs of structural change
and for fasteners with chipped or cracked paint. Where
possible, inspect fasteners from both sides. Clearly
mark and record all damaged fasteners on DA Form
2404 (Figure 2-4).
(8) Inspecting for Delaminations. To verify
suspected damage to honeycomb structures, use coin
tapping methods to determine size and shape of
disbonds/delaminations.
NOTE
Resonation of coin tapping on the
structure will determine hollowness
or existence of delaminations.
(9) Marking and Recording Damage.
(a) Damage Recording. Accurate
recording of damage is an important part of battle
damage assessment. Record all detected damage on
DA Form 2404 (Figure 2-4). Determine allowable
damage limits. Establish an order of repair on DA Form
2404 (Figure 2-4). Record individual areas of damage
to a single structural element separately on the form. If
a structural member is massively damaged or severed,
recording individual areas of damage is unnecessary.
(b) Damage Diagrams. Show the
location and extent of damage on copies of the
diagrams given in this chapter. The damage can be
drawn by hand. Accurately locating damage on a
diagram will greatly help the damage assessment
procedure.
(c) Marking Damage. Mark the
damaged structure using grease pencil or paint. Use the
labeling scheme given in Figure 2-5.
Figure 2-5. Measuring Cap or Longeron Damage
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