As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STUD P/N 120-064-3HN WAS INSTALLED IN WRONG POSITION. HAD TO REMOVE IT TO MAKE REPAIR TO STYROFOAM AND INSTALL PROPER STUD P/N 120-142-1. REMOVED PANEL AND MADE HOLE IN STYROFOAM. REMOVED STUD AND INSTALLED SERVICEABLE STUD. REPAIRED HOLE AND REINSTALLED PANEL.