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TM 55-1520-228-BD
GLOSSARY
DISTORTION
EROSION
EVACUATION
EXPEDIENT
FAILURE MODE
FATIGUE FAILURE
FIX
FLANGE
FLAKING
FLUORESCENT PENETRANT
FORMER
FRACTURE
FRAYING
FULLY MISSION
CAPABLE (FMC)
FUNCTIONAL GROUP
FUSELAGE
GLOS-4
GLOSSARY (Cont)
A change from an original shape.
Wearing away of metal.
A combat service support function which involves the
movement of recovered helicopters from a main supply
route, maintenance collection point, or maintenance
activity to higher categories of maintenance.
A rapid and often non-standard method of repairing
an item (repair technique).
The specific cause of failure, relating to categories
such as cracks, corrosion, ballistic impact, etc.
Sharp indentations, cracks, tool marks, or inclusions
that result in progressive yielding of one or more local
areas of material.
Any rapid action that returns a damaged part or
assembly to full or an acceptably degraded operating
condition (repair technique).
A broad ridge or pair of ridges projecting from the
edge of a structural element, providing additional
strength or a place for attachment.
Loose particles of metal or evidence of separation of a
surface covering material.
A test for locating cracks and fissures in non-
magnetic material, making use of radiation properties
of fluorescent particles when exposed to ultraviolet
light.
A curved structural element which gives the fuselage
its even aerodynamic shape.
stringers are attached and the skin is fitted
tightly over all these elements.
Separation of a part or piece of material from itself.
Loose or raveled threads and fibers.
The ability of the helicopter to perform ALL its combat
mission assignments.
Major helicopter subsystems identified in and
corresponding to functional groups in TM 55-1520-236-23.
The central main body of the helicopter.
Normally longerons and
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