Just wanted to put out the word on one thing to look for during the annual. While performing the annual on our Cub (L-21) after removing the panels covering the fuel tank I noticed that the ribbing had chafed into the tank. Someone had forgotten or neglected to install them. The result was that the rib on the panel had worn through approximately 80% of the tank material. Had this the tank completely worn through and come apart inflight I dont even want to think of what might have happened. Word of advice make sure you check for the anti-chafe strips under your fuel tank panels. Had they been installed on this cub it would have saved the $800 for a reconditioned tank. If anyone else has seen anything similar let me know.
Mark
Mark