Stringer - A long light structural member used as
longitudinal members in an airframe.
Structure - An assembly of connected structural
Structure, Nonessential - Structure whose function is
only to enhance aerodynamics or to protect and provide
access to internally housed components. Except for
secondary damage that may be caused by a structure
separating from the aircraft in flight, failure or loss of
nonessential structure will have no significant effect on
the performance or short-term reliability of the aircraft.
Structure, Primary - Structure that is essential to the
airworthiness of the aircraft, failure or loss of which,
alone or in combination with other failures, could
severely degrade the flight safety, ballistic survivability,
and/or crashworthiness of the aircraft.
Structure, Secondary - Structure that is essential to the
functional performance of the aircraft, failure or loss of
which, alone or in combination with other failures, could
degrade the mission capability of the aircraft.
Structures Category - One of four classifications which
describe the contribution of a structural component to
the airworthiness and mission capability of the aircraft.
Structural Component - A structural element or an
assembly of structural elements (door, stabilator, etc.).
Structural Element - One of the constituent parts of the
airframe (frame, beam panel, etc.) Structural Member A
Tension - The force tending to increase the dimension of
a body in the direction of the force.
Torsion - The internal movement of a body subjected to
Triage - The sorting out and classification of casualties
of war or other disaster to determine priority of need and
proper place of treatment.
Type I Repair Deferment - 100 flight-hour deferment'
unrestricted operating envelope.
Type II Repair Deferment - One-time flight defermentv
restricted operating envelope.
Web - Principal vertical member of a beam, spar, or
other primary structure running length of wing or
Wounds - Damage caused by ballistic impacts and
SECTION II. ACRONYMS AND ABBREVIATIONS
Aircraft combat maintenance/battle-damage repair
Armor pierdng incendiary
Auxiliary power unit
Aviation intermediate maintenance
Aviation unit maintenance