The main cost drivers are the planned labour and inspection scope, aircraft condition, utilisation, component time remaining, mandatory requirements, defects found during inspection, parts availability, exchange rates, freight, specialist services and testing. Engine and propeller work, structural repairs, corrosion, avionics faults and life-limited component replacements can materially affect the final cost.

The turnaround time can range from a short planned service to several weeks or longer for a major inspection, repair, refurbishment or modification programme.

Inspection terminology varies by aircraft type, maintenance programme and regulator. Typical categories include pre-flight and daily or transit checks, scheduled phase or periodic inspections, calendar inspections, annual or 100-hour inspections where applicable, progressive inspection programmes, special inspections after a defined event, and detailed component inspections.

A turboprop is maintained according to an approved maintenance programme rather than one standard service interval.

Fixed-wing turboprop aircraft maintenance covers the inspections, servicing, repairs, replacements, testing and records required to keep the aircraft airworthy and dependable.