AIRWORTHINESS A state in which an aircraft or component meets the conditions of its type design and is in a condition for safe operation.

AIRWORTHINESS CERTIFICATE A certificate issued by the FAA to aircraft that have been proven to meet the minimum standards set down by the Code of Federal Regulations.

ALTIMETER A flight instrument that indicates altitude by sensing pressure changes.

AME See AVIATION MEDICAL EXAMINER.

ANGLE OF ATTACK (AOA) The acute angle between the chord line of the airfoil and the direction of the relative wind.

ANGLE OF INCIDENCE The angle formed by the chord line of the wing and a line parallel to the longitudinal axis of the PPC cart.

ANNUAL INSPECTION A complete inspection of an aircraft and engine, required by the Code of Federal Regulations, to be accomplished every 12 calendar months on all certificated aircraft. Only an A&P technician holding an Inspection Authorization can conduct an annual inspection.

AOA See ANGLE OF ATTACK.

ARM The horizontal distance in inches from the reference datum line to the center of gravity of an item. Used in weight and loading calculations.

AROW The mnemonic aid to remember the certificates and documents required to be onboard an aircraft to determine airworthiness: Airworthiness certificate, Registration certificate, Operating limitations, Weight and balance data.

ASOS See AUTOMATED SURFACE OBSERV- ING SYSTEM.

ASPECT RATIO Span of a wing divided by its average chord.

ASYMMETRICAL AIRFOIL An airfoil section that is not the same on both sides of the chord line.

ATIS See AUTOMATIC TERMINAL INFORMA- TION SERVICE.

AUTOMATED SURFACE OBSERVING SYSTEM (ASOS) Weather reporting system which provides surface observations every minute via digitized voice broadcasts and printed reports.

AUTOMATED WEATHER OBSERVING SYSTEM (AWOS) Automated weather reporting system consisting of various sensors, a processor, a computer-generated voice subsystem, and a transmitter to broadcast weather data.

AUTOMATIC TERMINAL INFORMATION SERVICE (ATIS) The continuous broadcast (by radio or telephone) of recorded noncontrol, essential but routine, information in selected terminal areas.

AVIATION MEDICAL EXAMINER (AME) A medical doctor authorized to perform aviation medical exams for aviators.

BANK ATTITUDE The angle of the lateral axis relative to the horizon.