the Aviation Dictionary

aircraft alteration - The modification of an aircraft, its
structure, or its components that changes the physical
or flight characteristics of the aircraft. Alterations are
classified as major or minor, in accordance with
Federal Aviation Regulations, Part 43.
aircraft approach category - A grouping of aircraft
based on a speed of 1.3 times the stall speed in the
landing configuration at maximum gross landing
weight. An aircraft shall fit in only one category. If it is
necessary to maneuver at speeds in excess of the upper
limit of a speed range for a category, the minimums for
the next higher category should be used. For example,
an aircraft which falls in Category A? but is circling to
land at a speed in excess of 91 knots, should use the
approach Category B minimums when circling to land.
The categories are as follows:
a. Category A - Speed less than 91 knots.
b. Category B - Speed 91 knots or more but less
than 121 knots.
c. Category C - Speed 121 knots or more but less
than 141 knots.
d. Category D - Speed 141 knots or more but less
than 166 knots.
e. Category E - Speed 166 knots or more. Category
E includes only certain Military Aircraft and is not
included on Jeppesen Approach Charts.
aircraft basic operating weight - The established basic
weight of an aircraft available for flight without its fuel
and payload.
aircraft battery - A source of electrical energy for an
aircraft that can be used for starting. The battery also
serves as an auxiliary source of power when the engine
generator is inoperable.
aircraft cable - Strands of wire formed into a helical or
spiral shape. Cable designations are based on the
number of strands and the number of wires in each
strand. The most common aircraft cables are 7x7 and
7x 19.
aircraft checkouts - An instructional program designed
to familiarize and qualify - . a pilot - to act as pilot in
command of a particular aircraft type.
aircraft classes - For the purposes of Wake Turbulence
Separation Minima, ATC classifies aircraft as Heavy,
Large, and Small as follows:
a. Heavy - Aircraft capable of takeoff weights of
more than 255,000 pounds whether or not they are
operating at this weight during any particular phase of
flight.
b. Large - Aircraft of more than 41,000 pounds,
maximum certificated takeoff weight, up to 255,000
pounds.
c. Small - Aircraft of 41,000 pounds or less
maximum certificated takeoff weight.
aircraft conflict - Predicted conflict, within URET
CCLD (User Request Evaluation Tool Core Capability
aircraft alteration aircraft ulumbine
Limited Deployment), of two aircraft, or between
aircraft and airspace. A Red alert is used for conflicts
when the predicted minimum separation is 5 nautical
miles or less. A Yellow alert is used when the predicted
minimum separation is between 5 and approximately
12 nautical miles. A Blue alert is used for conflicts
between an aircraft and predefined airspace.
aircraft damage liability coverage - A policy that
covers any damage to the aircraft, and works much like
collision insurance on a car.
aircraft dope - A colloidal solution of cellulose acetate
or nitrate, combined with sufficient plasticizers to
produce a smooth, flexible, homogeneous film. The
dope increases a fabric's tensile strength, air tightness,
weatherproofing, and tautness.
aircraft engine - An engine that is used or intended to
be used for propelling aircraft. It includes
turbosuperchargers, appurtenances, and accessories
necessary for its functioning, but does not include
uro~ellers.
aircraft inspection - A systematic check of an aircrafi
and its components. The purpose of an aircraft
inspection is to detect any defects or malfunctions
before they become serious. Annual inspections, 100-
hour inspections, progressive inspections, and preflight
inspections are common types of aircraft inspections.
aircraft lighting system - A system that provides
illumination for both exterior and interior use. The
system includes lighting of instruments, cockpits,
cabins and other sections occupied by crewmembers
and passengers as well as exterior lights for landing
and ground taxiing.
aircraft list (ACL) - A view available with URET
CCLD (User Request Evaluation Tool Core Capability
Limited ~e~lovient', that lists aircraft currentlv in or
L .
predicted to be in a particular sector's airspace. The
view contains textual flight data information in line
format and may be sorted-into various orders based on
the specific needs of the sector team.
aircraft listings - Information sheets published by the
FAA that contain essential information on particular
models of aircraft.
aircraft log - A record containing the operational or
maintenance history of the aircraft.
aircraft operating weight - The basic weight of an
aircraft plus the weight of the crewmembers,
equipment, fuel, oil, and passengers.
aircraft pitch - the movement about an aircraft's lateral
or pitch axis. Movement of the cyclic forward or aft
causes the nose of the helicopter or gyroplane to pitch
up or down.
aircraft plumbing - The hoses, tubing, fittings, and
connections used to transfer fluids through an aircraft.
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