darrell whitley
Well-known member
On a 2001 citabria how much time/calendar between overhaul on my fixed pitch prop??
citabria prop
- Thread starter darrell whitley
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Bob Turner
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- Apr 4, 2018
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Overhaul on condition, not time.
darrell whitley
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Thank you!!!
BB57
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Bob is correct as you do in fact make an overhaul decision on a Sensenich fixed pitch aluminum prop based on condition. But per Sensenich, the TBO is 2000 hours (which was increased from 1000 hours in 1999) for normal and utility category operation. For aerobatic category operation the recommended TBO is still 1000 hours.
The lower TBO in aerobatic use is interesting as a propeller on a 7GCBC being operated off gravel strips will acquire a lot more damage to the leading edge than a propeller used on a 7KCAB for aerobatics and flown off paved or well maintained grass strips. You do have more gyroscopic stress on a propeller during aerobatic flight, but that is more of an issue with constant speed propellers, with their hubs and blade flanges.
https://www.sensenich.com/wp-content/uploads/2018/01/Service_Bulletins_R-17_1263314631.pdf
There is a service bullet for inspecting the propeller bore for cracks unless it is an “A” or “K” prefix serial number propeller that should be done at each annual or 100 hour inspection.
https://www.sensenich.com/wp-conten...ice_Bulletins_R-8-1_M74DM_Bore_1261680831.pdf
There is another SB for inspection for corrosion on the blades - and it recommends wiping the blades down periodically with an oily rag and or waxing them with car wax.
https://www.sensenich.com/wp-content/uploads/2018/01/Service_Bulletins_R-15A_1263314596.pdf
The lower TBO in aerobatic use is interesting as a propeller on a 7GCBC being operated off gravel strips will acquire a lot more damage to the leading edge than a propeller used on a 7KCAB for aerobatics and flown off paved or well maintained grass strips. You do have more gyroscopic stress on a propeller during aerobatic flight, but that is more of an issue with constant speed propellers, with their hubs and blade flanges.
https://www.sensenich.com/wp-content/uploads/2018/01/Service_Bulletins_R-17_1263314631.pdf
There is a service bullet for inspecting the propeller bore for cracks unless it is an “A” or “K” prefix serial number propeller that should be done at each annual or 100 hour inspection.
https://www.sensenich.com/wp-conten...ice_Bulletins_R-8-1_M74DM_Bore_1261680831.pdf
There is another SB for inspection for corrosion on the blades - and it recommends wiping the blades down periodically with an oily rag and or waxing them with car wax.
https://www.sensenich.com/wp-content/uploads/2018/01/Service_Bulletins_R-15A_1263314596.pdf
