the Aviation Dictionary

conditional routes (CDR) . connector
range). On other engines, it serves only as a fuel shutoff
lever.
conditional routes (CDR) - (Europe) - Category
1,2,3. Category 1 : Permanently plannable CDR during
designated times. Category 2: Plannable only during
times designated in the Conditional Route Availability
Message (CRAM) published at 15002 for the 24 hour
period starting at 06002 the next day. Category 3: Not
plannable. Useable only when directed by ATC.
conditionally unstable air - Unsaturated air that will
become unstable on the condition it becomes saturated.
conditions - The second part of a performance-based
objective, which describes the framework under which
the skill or behavior will be demonstrated.
conductance - The ability of a substance to conduct
electricity.
conduction - The transfer of heat through a substance or
from one substance in contact with another; transfer is
always from warmer to colder temperature.
conductive coating - A coating applied to the surface of
a material in order to allow it conduct electricity or to
make it able to conduct electricity more efficiently.
conductivity - The characteristic of a material that
makes it possible for it to transmit heat or electrical
energy by conduction.
conductor - A material whose outer ring electrons are
loosely bonded. Therefore, a relatively low voltage will
cause a flow of these electrons.
conduit - A duct or tube enclosing electrical wires or
cable.
cone - A three-dimensional geometric surface formed
by the rotation of a line around a fixed axis such that
the line always passes through a fixed point on the axis
the vertex) and always makes the same
with the axis.
cone clutch - A drive clutch consisting of nesting cones
as the contact surface.
cone of confusion - The cone shaped area above a VOR
station in which there is no signal and the TO/FROM
flag momentarily flickers to OFF.
cones - The cells concentrated in the center of the retina
which ~rovide color vision and fine detail.
conflict alert - A function of certain air traffic control
automated systems designed to alert radar controllers to
existing or pending situations between tracked targets
(known IFR or VFR aircraft) that require his
immediate attentiodaction.
conflict resolution - The resolution of potential
conflictions between aircraft that are radar identified
and in communication with ATC by ensuring that radar
targets do not touch. Pertinent traffic advisories shall
86
be issued when this procedure is applied. Note: This
procedure shall not be provided utilizing mosaic radar
systems.
conformance - The condition established when an
aircraft's actual position is within the conformance
region constructed around that aircraft at its position.
according to the trajectory associated with the aircraft's
Current Plan.
conformance region - A volume, bounded laterally,
vertically, and longitudinally, within which an aircraft
must be at a given time in order to be in conformance
with the current Plan Trajectory for that aircraft. At a
given time, the conformance region is determined by
the simultaneous application of the lateral, vertical, and
longitudinal conformance bounds for the aircraft at the
position defined by time and aircraft's trajectory.
conformity - Meeting all of the requirements of its
original conditions as specified in the Type Certificate
Data (TCD) Sheets and the manufacturer's
specifications, or properly altered per Supplemental
Type Certificates (STC).
conformity inspection - An inspection of an aircraft or
component to verify that all components installed on
the aircraft are approved either in the original Type
Certificate Data and manufacturer's specifications or as
modified by Supplemental Type Certificates or Field
Approvals (337's).
confusion between the symbol and the symbolized
object -Results when a word is confused with what it
is meant to represent. Words and symbols create
confusion when they mean different things to different
people.
congeal - Changing from a fluid to a solid state, or from
a free flowing liquid state to one that is less free
flowing.
congealed oil - Oil that has solidified because of cold or
contaminants.
conical - Cone-shaped,
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conifer - A softwood cone-bearing tree.
coning - In rotorcraft, an upward sweep of rotor blades
as a result of lift and centrifugal force.
coning angle - The angle formed by the rotor blades and
the axis of rotation of a helicopter rotor system. The
magnitude of the angle is' determine; by the
relationship between the centrifugal force and the lift
produced by the blades.
connecting rod - The component in an internal
combustion engine that connects the piston to the
crankshaft.
connector - A device used to join two pieces of wire.
tubing, or hose to a component.