| Hartzell Aluminium Hub Propellers Ag Aircraft 2000/36 due to severe chemical/corrosive environment Acrobatic Aircraft 1000/60 due to stress and maneuvers performed Franklin Applications 1500/72 60 months if Hub internal painting was not performed All other 2 bladed 2000/72 2400 hrs if new hub inst. 60 Months if no paint internal All other 3 bladed 2000/72 2400 hrs if new hub inst. 60 Months if no paint internal Steel Hub Hartzell Propellers RZWP Shanks Agricultural Aircraft 2000/36 due to corrosive environment Acrobatic Aircraft 1000/36 shorter time due to maneuvers Jacobs R-755 engine 1000/60 Hard Alloy Blades to overhaul at 36 months All others 2000/60 as above Hartzell Steel Hub X and V Shank Propellers\ Agricultural Aircraft 1000/36 shorter time due to corrosion Acrobatic Aircraft 1000/36 shorter time due to manuevers All others 1000/60 exept hard alloy 36 months Hartzell Steel Hub MV or HC-3,4,5,-T Agricultural Aircraft 2000/36 shorter time due to corrosion Acrobatic Aircraft 1000/36 shorter time due to manuevers All others 2000/60 exept hard alloy 36 months Hartzell Turbine Steel Hub Propeller Agricultural Aircraft 3000/36 shorter time due to corrosion All others 3000/60 Hartzell Turbine Aluminum Hub Propellers Agricultural Aircraft 3000/36 shorter time due to corrosion All others 3000/60 Hartzell Governors 2000 hrs of operation no calendar limit normally overhauled with engine | 
