TM 5-623
Figure B-86. Low-severity durability cracking.
Figure B-85. Low-severity durability cracking.
M-One of the following conditions exists (fig B-87):
Figure B-87. Medium-severity durability cracking.
1. "D" cracks cover less than 15 percent of the area and most of the pieces
have popped out or can be easily removed.
2. "D" cracks cover more than 15 percent of the area. Most of the cracks are
tight, but a few pieces may have popped our or can be easily removed.
H-"D" cracks cover more than 15 percent of the area and most of the pieces have
popped out or can be easily removed (see figs B-88 and B-89).
B-29
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