TM 55-1520-240-23-11
Sect ion II DEFINI TION OF UNUSUAL TERMS
TERM
DEFINITION
aerodynamic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pertaining to motion of air acting on aircraft.
anodizing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treatment of exterior aluminum alloy parts to prevent corrosion.
ballastd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Added weight to gain stability.
bowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Curving or gradual change from original line or plane. Usually
caused by lateral force or heat.
brinelling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circular indentations on surface of bearing races. Usually caused
by shock loading of balls or rollers.
burnishing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smoothing minor damage using a hand tool.
burr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rough edge or sharp protrusion on edge or surface.
chafing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Damage caused by two parts rubbing together.
chamfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Beveled edge.
chromidize . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Treatment for aluminum alloys to receive organic finish.
coaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Raised frame around door.
delamination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separation of material layers.
excluder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Screen that will prevent passage of particles larger than allowable
size.
extruded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Formed by forcing through a shaped hole in a die.
ferrules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metal band or socket.
frayed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Worn into shreds by rubbing action.
fusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Joining together of two materials. Usually caused by heat, friction,
or electrical current.
galling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fretting or wearing away by friction.
gouged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scooping out of material.
graduate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mark with measurements.
impregnated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Saturated or soaked.
inclinometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A device used to measure the angle from the horizontal.
insulate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Restrict passage of heat or sound.
integral . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Formed as a unit with another part.
lee side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Downwind side.
limited measures . . . . . . . . . . . . . . . . . . . . . . . . . .
Measures used only if preferred equipment or materials are not
available.
manometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
An instrument for measuring pressure.
nicked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A sharp surface indention. Parent material is displaced, seldom
separated.
oilcanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Skin that springs back when pressed in like an oil can.
pawl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A pivoted lever that allows another part to move only in one
direction.
pitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Small irregular shaped cavities, usually caused by corrosion,
chipping, or heavy electrical discharge.
radius . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distance from center to edge of circle. Half the diameter.
scored . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deep scratch or scratches. Material is removed.
scratched . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light, narrow, shallow, mark or marks on surface. Material is
displaced, not removed.
sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A broad, thin surface of material.
spalling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rough area resulting from progressive chipping away of material.
tacky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sticky to the touch.
transverse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In a side-to-side direction
Glossary-7/(-8 blank)
