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Landing, or platform: A landing is the area of a floor near the top or bottom step of a stair. An intermediate landing is a small platform that is built as part of stairs between main floor levels and is typically used to allow the stairs to change directions, or to allow the user a rest.
An airstair is a set of steps built into an aircraft so that passengers may board and alight the aircraft. The stairs are often built into a clamshell-style door on the aircraft. Airstairs eliminate the need for passengers to use a mobile stairway or jetway to board or exit the aircraft, providing more independence from ground services.
A dog-leg staircase A quarter-landing, on a dog-leg staircase, is made into an architectural feature, by the use of arches, vaulting and stained glass. A dog-leg is a configuration of stairs between two floors of a building, often a domestic building, in which a flight of stairs ascends to a quarter-landing before turning at a right angle and continuing upwards. [1]
Contrary to the ACN, the ICAO does not prescribe a standardized calculation procedure for the PCN. [4] Different PCN calculation procedures may therefore be found around the world. However, the ICAO defines a standardized reporting format for the PCN that comprises the PCN numerical value and a series of 4 letters. [1]
Clearway is an area beyond the paved runway, aligned with the runway centerline and under the control of the airport authorities. This area is not less than 500 ft and there are no protruding obstacles except for threshold lights provided they are not higher than 26 inches. There is a limit on the upslope of the clearway of 1.25%.
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Takeoff and Landing Performance Assessment (TALPA) is a method used by airport operators to determine runway conditions for takeoff and landing. It produces a Field Condition report that allows pilots to assess braking action when the runway is not dry.
Inbound aircraft to London Heathrow Airport typically follow one of a number of Standard Terminal Arrival Routes (STARs The STARs each terminate at one of four different RNAV waypoints (co-located with VOR navigational aids), and these also define four "stacks" [1] where aircraft can be held, if necessary, until they are cleared to begin their approach to land.