As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, FOUND THE NOSE COWL WITH HOLES RUBBED THROUGH FROM AFT SPINNER BULKHEAD. THIS IS A STC SA685AL INSTALLATION, AND THE THIRD AIRCRAFT KNOWN TO HAVE THIS PROBLEM. TOTAL TIME SINCE PROPELLER INSTALLED 50:1. COWL TO BULKHEAD CLEARANCE IS .1250 INCH, BUT NEEDS MORE CLEARANCE DUE TO COWL GROWTH FROM AIR PRESSURE.