Approved Maintenance Programme
A programme approved by the Original Equipment Manufacturer and/or the applicable NAA that specifies required maintenance and maintenance intervals for aircraft, engines and components.
Equivalent Terms: Maintenance Programme, Aircraft Maintenance Programme, Maintenance Planning Document (MPD)
Approved Maintenance Schedule See Approved Maintenance Programme.

Approved standard
A manufacturing, design, maintenance or quality standard approved by the Manufacturer and/or the applicable NAA.

Apron
A defined area on an airport intended to accommodate aircraft for loading or unloading of passengers, mail or cargo, or for fuelling, parking or maintenance.
Equivalent Terms: Ramp

Area Navigation (RNAV)
A method of navigation that permits aircraft operation on any desired flight path. Areas of Magnetic Unreliability (AMU)
Airspace located near the north or south poles where, due to the polar magnetic fields and closeness of the meridians, rapid changes in true headings/courses are created with small changes in aircraft position. Operations in such areas generally require special equipment and flight crew training.
ATS Flight Plan
Specified information supplied to an Air Traffic Services (ATS) unit relative to an intended flight or portion of an intended flight.
Equivalent Terms: ATC Flight Plan,

Authorised Person
A person authorised by the operator, AMO or applicable authority to carry out specific work and, where required, to certify for conduct of such work within the terms of the approval. A person may also be authorised by the authority for a specific purpose by the issue of a Maintenance Authorisation.