Exhaust cracks can be insidious, although sometimes they leave a gray-looking residue. Use a bright flashlight and inspect them every time the cowling is off.
In Case You Missed it
Dan’s World
Columnist Dan Checkoway appreciates the flexibility of owning a homebuilt rather than a certified aircraft. On a recent condition inspection of his RV-7, he detected small cracks in the front spar of the horizontal stabilizer. A week later he was working on replacing it, without any intervention from the FAA.
Build, Maintain, Inspect
One of the big reasons that people build their own airplane is the flexibility...