To whom it may concern,
Enclose you will find two pictures of an O290 D Lycoming. This engine had only flown 10 hours in the last 8 years, and was stored in a humid hangar. I was very concerned about corrosion during an inspection, I was conducting on this engine, so I removed #1 and #3 cylinder to better determine if any damage had occurred. It is quite obvious that there was none. I insist that AvBlend is used on any aircraft engine that I work on from now on.
Marvin Windows and Doors
Flight Department - Aircraft Maintenance