According maintenance plan of turbine producer after 60000 operation hours main overhaul of the turbine set should be done. The scope of activities includes inspection service activities on next main components: 1. Steam turbine model H2L/ V36UB including casing, rotor, bearings, valves, turbine foundation (between turbine and oil tank plus spring suspection between oil tank and concrete foundation), piping, ESV, Control valve and Main steam shut off valve; 2. Couplings and the gearbox type TX 80 / 5 C 3. Auxiliary systems for lubrication oil including all pumps, oil tank, oil coolers, filters, pipelines, shut-off fittings, valves and orifices; 4. Control oil system including all control pipelines, shut-off fittings, other system fixtures and valves and orifices; 5. Instrument and compressed air system of steam system; 6. Drain system including all pipelines, shut-off fittings, other system fixtures and valves and orifices; 7. Gland steam system all pipelines, shut-off fittings, other system fixtures, valves, orifices, air fans, filters and heat exchangers; 8. Steam turbine installation package including internal electrical systems. 9. Process automation system for the steam turbine installation unit inclusive of the safety system 10. Electrical generator type AMS 1000LM up to the outlet terminals including exciter, PMG and all of their auxiliary components; 11. Generator auxiliary systems- remote control of Generator,, cooling system including all units, fittings and exchangers.