TM 55-1680-320-23 & P
GLOSSARY
section 2. DEFINITIONS (Cent)
TERM
DEFINITION
L
N
Nick
P
Parent Metal
Puncture
R
Repair
Rub
s
scoring
scratch
Serviceable
Abnormal movement of a part.
A surface impression with sharp comers or bottom,
usually caused by pressure or impact from a sharp-edged
foreign body. Th e parent material is displaced but
usually none is separated.
The basic metal of a part, sometimes referred to as base
metal; the term is used particularly in connection with
welding, where the parent metal is that being welded
rather than that used in welding rod.
A hole that is pierced in a material.
To restore a defective part, component, subassembly or
assembly to a serviceable condition.
When one component contacts another and is moved in
relationship to it causing material to be removed from
it.
Multiple scratches, usually parallel and resulting from
the same cause.
A long, narrow sharp-cornered impression caused by the
movement of a sharp object across the surface of parent
material.
Equipment or parts that are in a condition which allows
them to be returned to operational status on an air-
craft.
Glossary 4
