Q: What are your thoughts on propeller TBOs? Seems like everyone in the industry says overhaul every six years due to hidden defects and corrosion. Owners and brokers claim “nobody does that.”
Any advice appreciated…
A: Dave, this is a commonly asked question and has a very simple answer.
Most external accessories on any Lycoming engine will have the same recommended TBO time as the specific engine model as set forth in the latest revision of Lycoming Service Instruction 1009.
However, any accessory, including propellers, must comply with the recommended maintenance and recommendations of the original manufacturer, including TBO times.
I’d suggest you work closely with your maintenance facility, which will be familiar with any product information the manufacturers may require.
Some accessories may require some type of action as required by the original manufacturer prior to the TBO time listed by Lycoming for the engine.
While I understand that you may hear “nobody does that,” I’d be hard pressed to agree with that type of mentality. Safety is the number one issue here and there are no shortcuts.
Please keep in mind that TBO times are established by the original manufacturer after years of evaluations, both from an engineering standpoint and in service life studies. The data collected from this approach is responsible for the issuance of service bulletins, etc., should some interim action be required.
Just remember, even though we may not be thrilled with a recommendation for action on a component, it’s really difficult to explain after the fact why you chose not to comply with a manufacturers recommendation should an incident occur.