On Tuesday the 17th of February around noon I was flying a Cirrus SR-20 from MYF to PSP. Along the way I thought I noticed a sudden increase in engine noise and some extra vibration but it was subtle. I checked all of my engine instruments and everything seemed ok. As I approached TRM at 9,500 I brought the power back a little for descent into PSP when I defintely heard some very odd noises and noticed unusual vibrations. We made it to PSP without incident and after landing I inspected the aircraft. I found that the rivets that hold the spinner to the backplate had come loose on one side allowing the spinner to become canted off-center. One of the prop blade cut-outs in the spinner put a deep gouge in the root of the prop blade and the now out-of-round back edge of the spinner ate away all of the cowling behind the spinner. The prop dome also had some scratches on it. So now we are looking at a new cowling, new spinner, and probably a new prop blade depending on what the prop shop says. Fortunately it is still under warranty. No idea what caused this failure. The airplane/prop/spinner had 686.3 hours on it at time of takeoff. I should have some digital pictures of the damage online sometime tomorrow and I’ll post links.
I’m not sure what would have happened had the spinner completely departed the airplane. I’m just glad I didn’t lose power or a prop blade!
I never push on the spinner but I’m not the only person who flies this airplane and that’s the only thing short of real manufacturing defect that I can thnk of that might contribute to this. Be careful with that spinner!