TM 1-1520-238-23
Change 1
2-377
2.103.
CLASSIFICATION OF EMPENNAGE DAMAGE AND TYPES OF REPAIR continued
Category
Action
Limits
h. Horizontal Stabilizer Leading Edge Abrasions, Cuts, and Cracks
A
Less than 50 percent of material
thickness. Each 10 percent reduction in
depth will double the permissible area or
length of damage.
Repair (TM 1-1500-204-23).
A
Abrasions of maximum depth not to
exceed 1.00 SQUARE-INCH. Cuts to
maximum depth not to exceed 1 INCH in
length.
Repair (TM 1-1500-204-23).
B
Exceeds A.
Replace.
i. Horizontal Stabilizer Leading Edge 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).
j. Kevlar/Epoxy Skin Cracks, Tears, or Punctures
B
Cracks or tears: less than 25 percent
length of shortest skin dimension.
Repair (para 2.30).
B
Punctures: less than 2.00 INCHES from
supporting structure.
Repair (para 2.30).
C
Exceeds B or hinders normal operation or
function.
Replace.
k. Kevlar/Epoxy Skin Delamination
B
No deeper than three plies or 0.050 INCH,
whichever is less. (Treat limit-exceeding
damages as crack, tear, or puncture
repair.)
Repair (para 2.30).
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