TM 55-2840-254-23
GLOSSARY (Continued)
Definition
Gouge . . . . . . . . . . . . . . . . . . . . .
. . . . . A wide rough scratch or group of scratches, usually, with
one or more sharply impressed corners, and frequently ac-
companied by deformation or removal of parent metal.
H
Heat Discoloration . . . . . . . . . . .
. . . . . Characterized by a discoloring film. Color varies from light
straw, tan, or light brown changing to red-purple, purple,
or blue. Caused by high temperature operation.
I
Insulation . . . . . . . . . . . . . . . . . . .
. . . . . A material or device used to prevent passage of heat electri-
city, or sound from one medium to another.
K
Kinks . . . . . . . . . . . . . . . . . . . . . .
. . . . . Short, tight twists or curls caused by a doubling or winding
of a hose or line upon itself. Likely to cause difficulties in
the operation.
L
. . . . . Abnormal movement of a part.
Loose . . . . . . . . . . . . . . . . . . . . . .
N
Nick . . . . . . . . . . . . . . . . . . . . . . .
. . . . . A surface impression with sharp corners or bottom, usually
caused by pressure or impact from a sharp-edged foreign
body. The parent material is displaced but usually none is
separated.
O
Overhaul . . . . . . . . . . . . . . . . . . . .
. . . . . To restore an item to a completely serviceable condition as
prescribed by serviceabiIity standards developed and pub-
lished by the Government.
Overshooting . . . . . . . . . . . . . . . . . . .. . . . . When the expected N1 or N2 speed is exceeded momentarily
and then drops below the expected level.
Overspend . . . . . . . . . . . . . . . . . . . . . . . . . . . When the expected N1 or N2 speed is exceeded.
Oxidation . . . . . . . . . . . . . . . . . . . . . . . . . . . A chemical action in which a metallic element is united with
oxygen causing deterioration of the metal or material.
Glossary-3
