As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ANNUAL INSPECTION, THE ORIGINAL AIR FILTER ASSEMBLY WAS FOUND TO HAVE HAD THE GUTS REMOVED AND ALTERED TO ACCEPT A BRACKET AIR FILTER ELEMENT BA-4106 WHICH WAS CUT TO SIZE. THIS IS NOT APPROVED AND NOT SAFE. AIRCRAFT TT: 2,385.0 HOURS.