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Second line servicing includes all servicing of air craft components and systems laid down in servicing instructions.
The relevant service manual for that aircraft.
Planned aircraft maintenance is calculated upon a combination of a calendar-based and a flying hour/landing cycles system of servicing procedures. To equalise servicing downtime and to maximise servicing opportunities, the actual maintenance task is split into equalised servicing procedures. This is where parts of different servicing checks are carried out between major servicing cycles
That is called the maintenance apron.
Apronsapron
Aprons
The attitude (do not confuse with altitude) indicator is nicknamed the artificial horizon.
That is the Parking Apron.
Aircraft propellers
That is called the Parking Apron
Yes, there are such parking areas at every airport.
An artificial horizon is a device which measures the pitch and roll of an aircraft in flight by comparing its attitude to a gyroscopically maintained indication of the flat horizon line.