Glossary 100-hour inspection.  An inspection required by 14 CFR  section 91.409 for FAA-certificated aircraft that are operated  for hire, or are used for flight instruction for hire. A 100- hour inspection is similar in content to an annual inspection,  but it can be conducted by an aircraft mechanic who holds  an Airframe and Powerplant rating, but does not have an  Inspection Authorization. A list of the items that must be  included in an annual or 100-hour inspection is included in  14 CFR part 43, Appendix D. 14 CFR.  See Title 14 of the Code of Federal Regulations. 14 CFR Part 1.  Federal Aviation Regulation from 14 CFR,  pertaining to definitions and abbreviations of terms. 14 CFR Part 61.  Federal Aviation Regulation from 14 CFR,  pertaining to the issuance of pilot and instructor certificates  and ratings. 14 CFR Part 67.  Federal Aviation Regulation from 14 CFR,  pertaining to medical standards and certification for pilots. 14 CFR Part 91.  Federal Aviation Regulation from 14 CFR,  pertaining to general operating and flight rules.  800-WX-BRIEF.  Phone number for reaching an FAA  Automated Flight Service Station 24 hours a day almost  anywhere in the United States. Aborted takeoff.  To terminate a planned takeoff when it is  determined that some condition exists which makes takeoff  or further flight dangerous. Above ground level (AGL).  The actual height above ground  level (AGL) at which the aircraft is flying. Acceleration.  Force involved in overcoming inertia, and  which may be defined as a change in velocity per unit of  time. AD.  See Airworthiness Directive. ADM.  See aeronautical decision-making. Adverse yaw.  A flight condition at the beginning of a turn in  which the nose of the aircraft starts to move in the direction  opposite the direction the turn is being made, caused by  the induced drag produced by the downward-deflected tip  holding back the wing as it begins to rise. Aerodynamics.  The science of the action of air on an object,  and with the motion of air on other gases. Aerodynamics  deals with the production of lift by the aircraft, the relative  wind, and the atmosphere. Aeronautical chart.  A map used in air navigation containing  all or part of the following: topographic features, hazards and  obstructions, navigation aids, navigation routes, designated  airspace, and airports. See also Sectional Chart. Aeronautical decision-making (ADM).  A systematic  approach to the mental process used by pilots to consistently  determine the best course of action in response to a given  set of circumstances. A/FD.  See airport/facility directory. AFM.  See aircraft flight manual. AFSS.  See automated flight service station. Aircraft.  A device that is used or intended to be used for  flight in the air. Aircraft accident.  An occurrence associated with the  operation of an aircraft that takes place between the time  any person boards the aircraft with the intention of flight  and all such persons have disembarked, and in which any  person suffers death or serious injury or in which the aircraft  receives substantial damage. (NTSB 830.2) G-1