TY JOUR TI Development of a Model for the Economic Evaluation of Predictive Maintenance of Airfield Lighting and Aerodrome Electrical Equipment Considering Failure Critically and Downtime Cost KW predictive maintenance KW airfield lighting equipment KW aerodrome electrical equipment KW failure KW downtime cost KW equipment criticality KW economic efficiency KW NPV KW TCO JO Journal of Applied Research AU Rebnitzkaya, I.V. AU Rovein, R.I. AU Spiridonov, V.Y. PY 2026 IS PB ITBO University