Attachment 1
Parking, Alert Aircraft--Parking for aircraft that must be in flight upon short notice.
Parking, Operational Aircraft--Parking for operational aircraft assigned to a particular installation.
Parking, Transient Aircraft--Parking for transient aircraft (non-operational) at the installation, but not
assigned there.
Parking, Transport Aircraft--Parking for transport aircraft carrying cargo and personnel which must
be loaded and unloaded.
Pavement (Paved Surface)--A durable weather and abrasion resistant surface made from a prepared or
manufactured material placed on an established base. General categories of pavements are flexible and
rigid.
Power Check--The full power test of an aircraft engine while the aircraft is held stationary.
Power Check Pad--An aircraft power check pad is a paved area, with an anchor block in the center,
used to perform full-power engine diagnostic testing of aircraft engines while the aircraft is held
stationary.
Precision Approach--An approach in which azimuth and glide slope information are provided to the
pilot.
Primary Surface (Fixed-Wing Runways)--An imaginary surface symmetrically centered on the
runway, extending 60.96 m (200 ft) beyond each runway end. The width varies depending upon the
class of runway and coincides with the lateral clearance distance. The elevation of any point on the
primary surface is the same as the elevation of the nearest point on the runway centerline.
Primary Surface (Rotary-Wing Runways and Landing Lanes)--An imaginary surface
symmetrically centered on the runway, extending beyond the runway ends. The width and length
depends upon whether the runway/landing lane is to accommodate VFR or IFR operations. The lateral
clearance distance coincides with the width of the primary surface. The elevation of any point on the
primary surface is the same as the elevation of the nearest point on the runway centerline.
Runway--A defined rectangular area of an airfield or heliport prepared for the landing and takeoff run
of aircraft along its length.
Runway (Class A)--Class A runways are primarily intended for small light aircraft. Ordinarily, these
runways have less than 10 percent of their operations involving aircraft in the Class B category. These
runways are normally less than 2,440 m (8,000 ft).
Runway (Class B)--Class B runways are all fixed-wing runways that accommodate normal operations
of Class B Aircraft.
Runway End--As used in this manual, the runway end is where the normal threshold is located. When
the runway has a displaced threshold, the using service will evaluate each individual situation and, based
on this evaluation, will determine the point of beginning for runway and airspace imaginary surfaces.
Runway Exit--A taxiway pavement provided for turnoffs from the runway to a taxiway either at
normal or high speed.
Runway, Parallel--Two or more runways at the same airport whose centerlines are parallel. In
addition to runway number, parallel runways are designated as L (left) and R (right) or, if three parallel
runways exist, L (left), C (center), and R (right).
A1-17
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