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Pilot's Handbook of Aeronautical Knowledge - Glossary

Terms in this set (886)

14 CFR
See Title 14 of the Code of Federal Regulations.
100-hour inspection
An inspection identical in scope to an annual inspection. Conducted every 100 hours of flight on aircraft of under 12,500 pounds that are used to carry passengers for hire.
Absolute accuracy
The ability to determine present position in space independently, and is most often used by pilots.
Absolute altitude
The actual distance between an aircraft and the terrain over which it is flying.
Absolute pressure
Pressure measured from the reference of zero pressure, or a vacuum.
A.C.
Alternating current.
Acceleration
Force involved in overcoming inertia, and which may be defined as a change in velocity per unit of time.
Acceleration error
A magnetic compass error apparent when the aircraft accelerates while flying on an easterly or westerly heading, causing the compass card to rotate toward North.
Accelerate-go distance
The distance required to accelerate to V1 with all engines at takeoff power, experience an engine failure at V1, and continue the takeoff on the remaining engine(s). The runway required includes the distance required to climb to 35 feet by which time V2 speed must be attained.
Accelerate-stop distance
The distance required to accelerate to V1 with all engines at takeoff power, experience an engine failure at V1, and abort the takeoff and bring the airplane to a stop using braking action only (use of thrust reversing is not considered).
Accelerometer
A part of an inertial navigation system (INS) that accurately measures the force of acceleration in one direction.
ADC
See air data computer.
ADF
See automatic direction finder.
ADI
See attitude director indicator.
Adiabatic cooling
A process of cooling the air through expansion. For example, as air moves up slope it expands with the reduction of atmospheric pressure and cools as it expands.
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