Part 91, the 5 year “TBO” not necessary to adhere to.

Mine were last overhauled in 2011 and resealed/repaired Feb 2019. I’ve seen no leakage. Contemplating what to do at my Nov ‘25 Annual.

Opinions?

https://www.aopa.org/news-and-media/all-news/2021/november/pilot/savvy-maintenance-propwash


1997 Seneca V
2300TT Mid-time Engines