Last night we had a fairly large storm after dark. Lots and lots of rain, and some thunder and lightning even. The rain cooled things down, and a high overcast sky meant that it was going to stay cool for a little while. The rain should have calmed the air down, so we should have a full morning of cool, smooth air. Perfect for flying! Thankfully, I had scheduled a training flight for the morning. Unfortunately, while preflighting the plane, I noticed a problem. Two of the fasteners along the front of the cowl were loose and one was missing. Looking at it closer, the two that were loose were the wrong size. It’s sunday, so the mechanics weren’t around. The plane therefore wasn’t airworthy and we had to scrub the flight. I’m bummed, but there’s always next week.