TM 1-1520-238-23
2-376
2.103.
CLASSIFICATION OF EMPENNAGE DAMAGE AND TYPES OF REPAIR continued
Category
Limits
Action
c. Castings, Forgings
A
Less than 25 percent of cross section and
less than 10 percent of thickness or 0.040
INCH depth (whichever is smaller).
(Reworked area must clear fastener holes
by not less than 0.50 INCH.)
Repair (TM 1-1500-204-23).
B
Exceeds A.
Requires depot repair.
d. Skin or Sheet Metal Nicks or Scratches
A
Less than 10 percent of material
thickness.
Clean up (para 1.47). (Area cannot
exceed 4.00 SQUARE-INCHES).
B
Deeper than 10 percent but less than 25
percent of material thickness.
Clean up (para 1.47). (Area cannot
exceed 5 percent of skin area and can be
no closer than 2.00 INCHES to supporting
structure.)
C
Exceeds B.
Replace.
e. Skin Dents
A
Smooth dents less than 0.25 INCH deep.
Repair (TM 1-1500-204-23).
B
Dents with nicks or gouges or deeper than
0.025 INCH.
Patch repair (TM 1-1500-204-23).
C
Dents greater than 3.00 INCHES in
diameter or cleanup will exceed 5 percent
of skin area or will be closer than 2.00
INCHES to supporting structure.
Clean up and remove any sharply bent
sections or other damaged sections that
could result in fatigue crack
initiation/progressive fatigue crack failure.
Patch repair damage clean section
(TM 1-1500-204-23).
f. Cover Cracks, Tears, and Punctures
B
Less than 25 percent length of shortest
dimension.
Repair (TM 1-1500-204-23).
C
Exceeds B.
Replace.
g. Horizontal Stabilator Actuator Fitting Cracks
C
Any crack.
Replace.
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