seems to be pretty good separation, but I'll double checkLikely cause by the airbox hitting the cowl.
What Walt said. I went thru a bunch of plates before I was able to resolve the issue. I "softened" the connection between the cowl and airbox to reduce the loads seen by the plate. I used a piece of appropriately sized SCAT tubing, re-shaped to match the air inlet in the cowl. The other end is riveted and pro-sealed to the airbox. I haven't replaced a plate in 15 years.Likely cause by the airbox hitting the cowl.