‘Aircraft Variant’ as used with respect to the licensing and operation of flight crew, means an aircraft of the same basic certificated type which contain modifications not resulting in significant changes of handling and/or flight characteristic, or flight crew complement, but causing significant changes to equipment and/or procedures.
*‘Airframe’ means the fuselage, booms, nacelles, cowlings, fairings, aerofoil surfaces (including rotors but excluding propellers and rotating aerofoils of engines), and landing gear of an aircraft and their accessories and controls. 
*‘Alternate airport’ means an airport at which an aircraft may land if a landing at the intended airport becomes inadvisable. 
*‘Appliance’ means any instrument, mechanism, equipment, part, apparatus, appurtenance, or accessory, including communications equipment, that is used or intended to be used in operating or controlling an aircraft in flight, is installed in or attached to the aircraft, and is not part of an airframe, engine, or propeller.
‘Applicant’ means a person applying for approval of an aircraft or any part thereof.
‘Approved by the Authority’ means documented by the Authority as suitable for the purpose intended.
‘Atmosphere, International Standard’ means the atmosphere defined in ICAO Document 7488/2. For the purposes of JAR the following is acceptable:–