Boeing Directory - a glossary of terms. The letter L.
Labyrinth seals, rotary and stationary connecting structures that use air pressure differential to form the inner seal. The most commonly used in turbo.
Layered construction, formed from layers of composite materials, soedinnenye or vulcanized together to create a sound and light design.
CHASSIS, the front and rear wheels with the connection elements to support the aircraft on the ground.
LANDING GEAR DOORS
LEAF CHASSIS, panels, managed jointly with the chassis to chassis closing compartments, where retractable landing gear.
Landing weight, the full weight of the aircraft at the port of arrival or to the alternate airport.
EXHAUST FAL cable to support or hold the panels in the open position.
Lap joints, the sheet metal strip to connect the edge of another sheet metal structures in aircraft.
Laser gyroscope, gyroscope, which uses two light laser beam to measure the angular rotation.
Latches, clamps, a device for clamping or closing.
Transverse axis, the axis passing through the center of gravity of the aircraft from one wingtip to the other.
Horizontal navigation, autopilot mode in which the FMCS is used to control the roll of the aircraft in flight.
LEAD ACID BATTERY
Lead-acid battery, electric device for converting stored chemical energy into direct current. Use lead, lead oxide and sulfuric acid.
The front edge, the front edge of the wing, stabilizer or controls.
LED, sm.-LIGHT EMITTING DIODE.
LIGHT EMITTING DIODE
LED, electronic device that lights up in red, yellow or green when it is served on the electric current.
Light boards, components of the toolbar to highlight words on it.
Switch with light indication, circuit breaker, which includes the backlight. The backlight is turned on or, or turned off when the switch is in the OFF or ON.
LIMIT SWITCH, mechanically controlled component within the electric control device, which turns off the electrical power to the control mechanism when the control mechanism reaches its open or closed position.
LEMAC, abbreviation for the front edge of the mean aerodynamic chord.
Lift force, vertical force, which produces the airflow over the upper and lower wing surfaces.
RESTRICTIONS, aircraft performance and operating limitations listed in the Guidelines for FLIGHT (AFM), such as the maximum air speed, maximum height and center of gravity limits.
LINE REPLACEABLE UNIT
Replacement unit on the line, a unit that can be quickly replaced on the aircraft during operational service on the line.
LINE SELECT KEYS
KEY SELECTION LINE switches FMCS control display, allowing to manage information to and from the "roughing line", as well as for dedicated display areas.
LINEAR VARIABLE DIFFERENTIAL TRANSFORMER
Linear variable differential transformer INDUCTANCE (inductive sensor with differential transformer), a differential transformer with a linear output.
ROD, a short connecting rod for transmitting movement.
LNAV, SEE - LATERAL NAVIGATION
LOAD AND TRIM SHEET
BALANCE SHEET AND DOWNLOADS, form containing tables and graphs to calculate the weight and balance effect for all items and fuel loaded before each departure.
Localizer, the ILS system component that provides flight control in the horizontal plane to the runway.
LOCALIZER, The component of an ILS which provides lateral course guidance to the runway.
LNAV, sm.-LATERAL NAVIGATION.
Locking bolts, a steel clamp that prevents unwanted unwinding using crimp sleeve instead of nuts.
LOGIC DIAGRAM, A diagram that uses logic gates to represent the function of a control circuit.
LOGIC, the scheme, which uses electronic logic devices for presentation function electrical control circuit.
LOGIC electronics devices, device or electrical circuit, which has an output signal as long as it is not involved in the work of the input signal There are logic AND, OR, NOT, AND negative, negative, OR, and exclusive OR.
LIGHT SIGN COMPANY, spot or flood lighting type, located on the aircraft structure and directed to the sign of the airline or other inscription on the fuselage or tail surfaces for visibility in the dark.
Spar member in the horizontal direction of the fuselage or the nacelle.
A longitudinal axis, the axis passing through the aircraft's center of gravity from the front part to the rear.
LOST MOTION DEVICE
LOST MOTION DEVICE, a mechanism that does not control the component, following the internal displacement of an input control signal.
BLINDS, opened with a slit gap for the passage of air through them.
LRRA, sm.-LOW RANGE RADIO ALTIMETER.
LRU, sm.-LINE REPLACEBLE UNIT.
MAC, sm.-MEAN AERODYNAMIC CHORD.
LVDT, sm.-LINEAR VARIABLE DIFFERENTIAL TRANSFORMER.
Lubricants, a substance used to reduce friction between moving parts. It may be natural and synthetic material.
LOW RANGE RADIO ALTIMETER
Radio altimeter SMALL Range (ACTION), a system that measures the vertical distance between the aircraft and the ground.
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