the Aviation Dictionary

lithium grease - A water-resistant, low operating
temperature grease made of lithium salts and fatty
acids.
lithometeor - In meteorology, dry particles suspended
in the atmosphere such as dust, smoke, and haze.
lithosphere - The Earth's most outer area consisting of
the Earth's crust and the upper mantle. The lithosphere
extends downward toward the center of the Earth
approximately 50 to 60 miles.
litmus - A water-soluble powder that turns red in acid
solutions and blue in alkaline solutions.
litmus paper - An indicator paper that changes color
when it comes in contact with an acid or an alkali. It
turns red when wet with an acid, and blue when wet
with an alkali.
live center - A lathe component with a sharp-pointed
center that fits into the headstock of a lathe and turns
with it. Used to locate the exact center of the
headstock.
lithium grease localizer usable distance
LOC mode - The operating position of an automatic
pilot when it is receiving its signals from the localizer
portion of an instrument landing system.
local action - The formation of tiny chemical cells in
one or both of the poles of a chemical cell (battery) due
to impurities in the material. Local action can result in
the exhausting of the service capacity of a cell or
corrosion of the pole pieces.
local airport advisory (LAA)- A service provided by
flight service stations or the military at &ports not
serviced by an operating control tower. This service
consists of providing information to arriving and
departing aircraft concerning wind direction and speed,
favored runway, altimeter setting, pertinent known
traffic, pertinent known field conditions, airport taxi
routes and traffic patterns, and authorized instrument
approach procedures. This information is advisory in
nature and does not constitute an ATC clearance.
local Mach number - In aerodynamics, the speed of air
flow (Mach number) at a specified location. Because of
the aerodynamic shape of an aircraft, the speed of
load - An energy-absorbing or energy-using device of
airflow at any point can be greater than the air speed of
any sort connected to a current.
the aircraft as a whole.
load bank - A resistor used to discharge a local oscillator - The internal oscillator section of a
storage battery.
superhetrodyne circuit.
load - An weighing 'ystem component local tramc - Aircraft operating in the trafic or
that contains the strain gauges. It is placed between an
within sight of the tower, or aircraft known to be
aircraft jack pad and the jack to measure the weight of
departing or arriving from flight in local practice areas,
the aircraft load.
or aircraft executing practice instrument approaches at
load chart - A chart used for weight and balance the airport.
purposes that specifies the location and distribution of
localher - The component of an ILS that provides
weights. It aids the pilot in determining the loaded
course guidance to the runway.
center of gravity condition.
localiuer course [ICAO]- The locus of points, in any
load factor - The ratio of the load supported by the
given horizontal plane, at which the DDM (difference
airplane's wings to the actual weight of the aircraft and
in depth of modulation) is zero.
its contents. Also referred to as G-loadine.
.2
localizer offset - An angular offset of the localizer from
load manifest - An itemized list of weights and
the runway extended centerline in a direction away
moments of a particular load taken on a specific flight.
from the no transgression zone (NTZ) that increases
Used by FAR Part 121 and 135 operators.
the normal operating zone (NOZ) width. An offset
load, electrical - Any apparatus that uses electrical requires a 50 foot increase in DH and is not authorized
power to perform a hnction such as operating a motor. for CAT I1 and CAT 111 approaches.
loading graph - A method of computing the loaded
weight and center of gravity of an aircraft.
loading schedule - A document showing where cargo
should be stowed and in what weights at specified
locations.
loadmeter - A current measuring instrument calibrated
in terms of the percentage of the total rated current of
the power source.
lobes - The eccentric portions of a cam or camshaft.
localizer performance with vertical guidance (LPV) --
An instrument approach that takes advantage of WAAS
to provide electronic lateral and vertical guidance.
localizer type directional aid - A NAVAID used for
nonprecision instrument approaches with utility and
accuracy comparable to a localizer but that is not a part
of a complete ILS and is not aligned with the runway.
localizer usable distance - The maximum distance
from the localizer transmitter at a specified altitude, as
verified by flight inspection, at which reliable course
information is continuously received.
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