As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTED AIRCRAFT FOLLOWING PURCHASE FOR FLIGHT SCHOOL. DISCOVERED INDUCTION AIR FILTER INSTALLED BACKWARDS. HOUSING IS EVEN LABELED FOR AIRFLOW WITH AN ARROW. HOUSING WAS IN BACKWARDS ALSO. WITH ARROW POINTING FORWARD AWAY FROM THE CARB TOWARDS THE INSIDE.